Merge pull request #564 from MihailRis/small-optimizations

optimize shadow maps generation a bit

res/preload.json

@@ -5,6 +5,7 @@
         "main",
         "lines",
         "entity",
+        "translucent",
         "background",
         "skybox_gen",
         "shadows"

res/shaders/effect.glslf

@@ -18,6 +18,7 @@ uniform mat4 u_view;
 uniform mat4 u_inverseView;
 uniform vec3 u_sunDir;
 uniform vec3 u_cameraPos;
+uniform float u_gamma;
 
 #include <__effect__>
 

res/shaders/effects/deferred_lighting.glsl

@@ -29,6 +29,8 @@ vec4 effect() {
 
     light = max(light, emission);
 
+    light = pow(light, u_gamma);
+
     vec3 fogColor = texture(u_skybox, dir).rgb;
     float fog = calc_fog(length(u_view * vec4((modelpos.xyz - u_cameraPos) * FOG_POS_SCALE, 0.0)) / 256.0);
     return vec4(mix(texture(u_screen, v_uv).rgb * mix(1.0, light, 1.0), fogColor, fog), 1.0);

res/shaders/entity.glslf

@@ -3,27 +3,18 @@ layout (location = 1) out vec4 f_position;
 layout (location = 2) out vec4 f_normal;
 layout (location = 3) out vec4 f_emission;
 
-in float a_distance;
-in float a_fog;
-in vec2 a_texCoord;
-in vec3 a_dir;
-in vec3 a_normal;
-in vec3 a_position;
-in vec3 a_realnormal;
+#include <world_fragment_header>
+
 in vec4 a_color;
-in vec4 a_modelpos;
-in float a_emission;
 
 uniform sampler2D u_texture0;
-uniform samplerCube u_skybox;
+
 uniform vec3 u_fogColor;
 uniform float u_fogFactor;
 uniform float u_fogCurve;
 uniform bool u_alphaClip;
 uniform vec3 u_sunDir;
 
-#include <shadows>
-
 void main() {
     vec4 texColor = texture(u_texture0, a_texCoord);
     float alpha = a_color.a * texColor.a;

res/shaders/entity.glslv

@@ -6,44 +6,23 @@ layout (location = 2) in vec3 v_color;
 layout (location = 3) in vec4 v_light;
 layout (location = 4) in vec4 v_normal;
 
-out float a_distance;
-out float a_fog;
-out vec2 a_texCoord;
-out vec3 a_dir;
-out vec3 a_normal;
-out vec3 a_position;
-out vec3 a_realnormal;
-out vec4 a_color;
-out vec4 a_modelpos;
-out float a_emission;
-
-uniform mat4 u_model;
-uniform mat4 u_proj;
-uniform mat4 u_view;
-uniform vec3 u_cameraPos;
-uniform float u_gamma;
-uniform float u_opacity;
-uniform float u_timer;
-uniform samplerCube u_skybox;
-
-uniform vec3 u_torchlightColor;
-uniform float u_torchlightDistance;
-
+#include <world_vertex_header>
 #include <lighting>
 #include <fog>
+#include <sky>
+
+out vec4 a_color;
 
 void main() {
     a_modelpos = u_model * vec4(v_position, 1.0);
     vec3 pos3d = a_modelpos.xyz - u_cameraPos;
-    a_modelpos.xyz = apply_planet_curvature(a_modelpos.xyz, pos3d);
 
     a_realnormal = v_normal.xyz * 2.0 - 1.0;
     a_normal = calc_screen_normal(a_realnormal);
 
-    vec3 light = v_light.rgb;
-    float torchlight = calc_torch_light(a_realnormal, a_modelpos.xyz);
-    light += torchlight * u_torchlightColor;
-    a_color = vec4(pow(light, vec3(u_gamma)), 1.0f);
+    a_color = vec4(calc_torch_light(
+        v_light.rgb, a_realnormal, a_modelpos.xyz, u_torchlightColor, u_gamma
+    ), 1.0);
     a_texCoord = v_texCoord;
 
     a_dir = a_modelpos.xyz - u_cameraPos;

res/shaders/lib/commons.glsl

@@ -1,14 +1,7 @@
 #ifndef COMMONS_GLSL_
 #define COMMONS_GLSL_
-#include <constants>
 
-vec3 pick_sky_color(samplerCube cubemap) {
-    vec3 skyLightColor = texture(cubemap, vec3(0.4f, 0.0f, 0.4f)).rgb;
-    skyLightColor *= SKY_LIGHT_TINT;
-    skyLightColor = min(vec3(1.0f), skyLightColor * SKY_LIGHT_MUL);
-    skyLightColor = max(MIN_SKY_LIGHT, skyLightColor);
-    return skyLightColor;
-}
+#include <constants>
 
 vec3 apply_planet_curvature(vec3 modelPos, vec3 pos3d) {
     modelPos.y -= pow(length(pos3d.xz) * CURVATURE_FACTOR, 3.0f);

res/shaders/lib/lighting.glsl

@@ -6,6 +6,11 @@ float calc_torch_light(vec3 normal, vec3 modelpos) {
          * max(0.0, -dot(normal, normalize(modelpos - u_cameraPos)));
 }
 
+vec3 calc_torch_light(vec3 light, vec3 normal, vec3 modelpos, vec3 torchLightColor, float gamma) {
+    float torchlight = calc_torch_light(normal, modelpos);
+    return pow(light + torchlight * torchLightColor, vec3(gamma));
+}
+
 vec3 calc_screen_normal(vec3 normal) {
     return transpose(inverse(mat3(u_view * u_model))) * normal;
 }

res/shaders/lib/shadows.glsl

@@ -35,7 +35,7 @@ float calc_shadow(
         }
         shadow /= 9.0;
     } else {
-        shadow = 0.5;
+        shadow = 0.0;
     }
     return shadow;
 }

res/shaders/lib/sky.glsl

@@ -0,0 +1,14 @@
+#ifndef COMMONS_SKY_
+#define COMMONS_SKY_
+
+#include <constants>
+
+vec3 pick_sky_color(samplerCube cubemap) {
+    vec3 skyLightColor = texture(cubemap, vec3(0.4f, 0.0f, 0.4f)).rgb;
+    skyLightColor *= SKY_LIGHT_TINT;
+    skyLightColor = min(vec3(1.0f), skyLightColor * SKY_LIGHT_MUL);
+    skyLightColor = max(MIN_SKY_LIGHT, skyLightColor);
+    return skyLightColor;
+}
+
+#endif // COMMONS_SKY_

res/shaders/lib/world_fragment_header.glsl

@@ -0,0 +1,17 @@
+#ifndef GLSL_WORLD_FRAGMENT_HEADER_
+#define GLSL_WORLD_FRAGMENT_HEADER_
+
+in float a_distance;
+in float a_fog;
+in vec2 a_texCoord;
+in vec3 a_dir;
+in vec3 a_normal;
+in vec3 a_position;
+in vec3 a_realnormal;
+in vec3 a_skyLight;
+in vec4 a_modelpos;
+in float a_emission;
+
+#include <world_uniforms>
+
+#endif // GLSL_WORLD_FRAGMENT_HEADER_

res/shaders/lib/world_uniforms.glsl

@@ -0,0 +1,15 @@
+#ifndef GLSL_WORLD_UNIFORMS_
+#define GLSL_WORLD_UNIFORMS_
+
+uniform mat4 u_model;
+uniform mat4 u_proj;
+uniform mat4 u_view;
+uniform vec3 u_cameraPos;
+uniform float u_gamma;
+uniform float u_opacity;
+uniform float u_timer;
+uniform samplerCube u_skybox;
+uniform vec3 u_torchlightColor;
+uniform float u_torchlightDistance;
+
+#endif // GLSL_WORLD_UNIFORMS_

res/shaders/lib/world_vertex_header.glsl

@@ -0,0 +1,17 @@
+#ifndef GLSL_WORLD_VERTEX_HEADER_
+#define GLSL_WORLD_VERTEX_HEADER_
+
+out float a_distance;
+out float a_fog;
+out vec2 a_texCoord;
+out vec3 a_dir;
+out vec3 a_normal;
+out vec3 a_position;
+out vec3 a_realnormal;
+out vec3 a_skyLight;
+out vec4 a_modelpos;
+out float a_emission;
+
+#include <world_uniforms>
+
+#endif // GLSL_WORLD_VERTEX_HEADER_

res/shaders/main.glslf

@@ -3,20 +3,11 @@ layout (location = 1) out vec4 f_position;
 layout (location = 2) out vec4 f_normal;
 layout (location = 3) out vec4 f_emission;
 
-in float a_distance;
-in float a_fog;
-in vec2 a_texCoord;
-in vec3 a_dir;
-in vec3 a_normal;
-in vec3 a_position;
-in vec3 a_realnormal;
-in vec3 a_skyLight;
-in vec4 a_modelpos;
+#include <world_fragment_header>
+
 in vec4 a_torchLight;
-in float a_emission;
 
 uniform sampler2D u_texture0;
-uniform samplerCube u_skybox;
 uniform vec3 u_sunDir;
 
 // flags
@@ -24,8 +15,6 @@ uniform bool u_alphaClip;
 uniform bool u_debugLights;
 uniform bool u_debugNormals;
 
-#include <shadows>
-
 void main() {
     vec4 texColor = texture(u_texture0, a_texCoord);
     float alpha = texColor.a;
@@ -39,9 +28,7 @@ void main() {
     }
     if (u_debugLights)
         texColor.rgb = u_debugNormals ? (a_normal * 0.5 + 0.5) : vec3(1.0);
-    else if (u_debugNormals) {
-        texColor.rgb *= a_normal * 0.5 + 0.5;
-    }
+
     f_color = texColor;
     f_color.rgb *= min(vec3(1.0), a_torchLight.rgb + a_skyLight);
 

res/shaders/main.glslv

@@ -5,44 +5,23 @@ layout (location = 1) in vec2 v_texCoord;
 layout (location = 2) in vec4 v_light;
 layout (location = 3) in vec4 v_normal;
 
-out float a_distance;
-out float a_fog;
-out vec2 a_texCoord;
-out vec3 a_dir;
-out vec3 a_normal;
-out vec3 a_position;
-out vec3 a_realnormal;
-out vec4 a_torchLight;
-out vec3 a_skyLight;
-out vec4 a_modelpos;
-out float a_emission;
-
-uniform mat4 u_model;
-uniform mat4 u_proj;
-uniform mat4 u_view;
-uniform vec3 u_cameraPos;
-uniform float u_gamma;
-uniform float u_timer;
-uniform samplerCube u_skybox;
-
-uniform vec3 u_torchlightColor;
-uniform float u_torchlightDistance;
-
+#include <world_vertex_header>
 #include <lighting>
 #include <fog>
+#include <sky>
+
+out vec4 a_torchLight;
 
 void main() {
     a_modelpos = u_model * vec4(v_position, 1.0f);
     vec3 pos3d = a_modelpos.xyz - u_cameraPos;
-    a_modelpos.xyz = apply_planet_curvature(a_modelpos.xyz, pos3d);
 
     a_realnormal = v_normal.xyz * 2.0 - 1.0;
     a_normal = calc_screen_normal(a_realnormal);
 
-    vec3 light = v_light.rgb;
-    float torchlight = calc_torch_light(a_realnormal, a_modelpos.xyz);
-    a_torchLight = vec4(pow(light + torchlight * u_torchlightColor, vec3(u_gamma)), 1.0f);
-
+    a_torchLight = vec4(calc_torch_light(
+        v_light.rgb, a_realnormal, a_modelpos.xyz, u_torchlightColor, u_gamma
+    ), 1.0);
     a_texCoord = v_texCoord;
 
     a_dir = a_modelpos.xyz - u_cameraPos;
@@ -51,9 +30,11 @@ void main() {
 
     mat4 viewmodel = u_view * u_model;
     a_distance = length(viewmodel * vec4(pos3d, 0.0));
+
 #ifndef ADVANCED_RENDER
     a_fog = calc_fog(length(viewmodel * vec4(pos3d * FOG_POS_SCALE, 0.0)) / 256.0);
 #endif
+
     a_emission = v_normal.w;
 
     vec4 viewmodelpos = u_view * a_modelpos;

res/shaders/translucent.glslf

@@ -0,0 +1,38 @@
+layout (location = 0) out vec4 f_color;
+
+#include <world_fragment_header>
+
+in vec4 a_torchLight;
+
+uniform sampler2D u_texture0;
+uniform vec3 u_sunDir;
+
+// flags
+uniform bool u_alphaClip;
+uniform bool u_debugLights;
+uniform bool u_debugNormals;
+
+#include <shadows>
+
+void main() {
+    vec4 texColor = texture(u_texture0, a_texCoord);
+    float alpha = texColor.a;
+    if (u_alphaClip) {
+        if (alpha < 0.2f)
+            discard;
+        alpha = 1.0;
+    } else {
+        if (alpha < 0.002f)
+            discard;
+    }
+    if (u_debugLights)
+        texColor.rgb = u_debugNormals ? (a_normal * 0.5 + 0.5) : vec3(1.0);
+
+    f_color = texColor;
+    f_color.rgb *= min(vec3(1.0), a_torchLight.rgb + a_skyLight
+        * calc_shadow(a_modelpos, a_realnormal, length(a_position)));
+
+    vec3 fogColor = texture(u_skybox, a_dir).rgb;
+    f_color = mix(f_color, vec4(fogColor, 1.0), a_fog);
+    f_color.a = alpha;
+}

res/shaders/translucent.glslv

@@ -0,0 +1,39 @@
+#include <commons>
+
+layout (location = 0) in vec3 v_position;
+layout (location = 1) in vec2 v_texCoord;
+layout (location = 2) in vec4 v_light;
+layout (location = 3) in vec4 v_normal;
+
+#include <world_vertex_header>
+#include <lighting>
+#include <fog>
+#include <sky>
+
+out vec4 a_torchLight;
+
+void main() {
+    a_modelpos = u_model * vec4(v_position, 1.0f);
+    vec3 pos3d = a_modelpos.xyz - u_cameraPos;
+
+    a_realnormal = v_normal.xyz * 2.0 - 1.0;
+    a_normal = calc_screen_normal(a_realnormal);
+
+    a_torchLight = vec4(calc_torch_light(
+        v_light.rgb, a_realnormal, a_modelpos.xyz, u_torchlightColor, u_gamma
+    ), 1.0);
+    a_texCoord = v_texCoord;
+
+    a_dir = a_modelpos.xyz - u_cameraPos;
+    vec3 skyLightColor = pick_sky_color(u_skybox);
+    a_skyLight = skyLightColor.rgb*v_light.a;
+
+    mat4 viewmodel = u_view * u_model;
+    a_distance = length(viewmodel * vec4(pos3d, 0.0));
+    a_fog = calc_fog(length(viewmodel * vec4(pos3d * FOG_POS_SCALE, 0.0)) / 256.0);
+    a_emission = v_normal.w;
+
+    vec4 viewmodelpos = u_view * a_modelpos;
+    a_position = viewmodelpos.xyz;
+    gl_Position = u_proj * viewmodelpos;
+}

src/data/setting.hpp

@@ -53,7 +53,7 @@ public:
         });
     }
 
-    const T& get() const {
+    [[nodiscard]] const T& get() const {
         return value;
     }
 

src/frontend/ContentGfxCache.cpp

@@ -9,9 +9,11 @@
 #include "graphics/core/Atlas.hpp"
 #include "maths/UVRegion.hpp"
 #include "voxels/Block.hpp"
+#include "debug/Logger.hpp"
 #include "core_defs.hpp"
 #include "settings.hpp"
 
+static debug::Logger logger("content-gfx-cache");
 
 ContentGfxCache::ContentGfxCache(
     const Content& content,
@@ -22,27 +24,29 @@ ContentGfxCache::ContentGfxCache(
     refresh();
 }
 
-static void refresh_variant(
-    const Assets& assets,
+void ContentGfxCache::refreshVariant(
     const Block& def,
     const Variant& variant,
     uint8_t variantIndex,
-    std::unique_ptr<UVRegion[]>& sideregions,
-    const Atlas& atlas,
-    const GraphicsSettings& settings,
-    std::unordered_map<blockid_t, model::Model>& models
+    const Atlas& atlas
 ) {
+    bool denseRender = settings.denseRender.get();
     for (uint side = 0; side < 6; side++) {
         std::string tex = variant.textureFaces[side];
-        if (variant.culling == CullingMode::OPTIONAL &&
-            !settings.denseRender.get() && atlas.has(tex + "_opaque")) {
-            tex = tex + "_opaque";
+        std::string texOpaque = tex + "_opaque";
+
+        if (!atlas.has(tex)) {
+            tex = TEXTURE_NOTFOUND;
         }
-        if (atlas.has(tex)) {
-            sideregions[(def.rt.id * 6 + side) * MAX_VARIANTS + variantIndex] = atlas.get(tex);
-        } else if (atlas.has(TEXTURE_NOTFOUND)) {
-            sideregions[(def.rt.id * 6 + side) * MAX_VARIANTS + variantIndex] = atlas.get(TEXTURE_NOTFOUND);
+
+        if (!atlas.has(texOpaque)) {
+            texOpaque = tex;
+        } else if (variant.culling == CullingMode::OPTIONAL && !denseRender) {
+            tex = texOpaque;
         }
+        size_t index = getRegionIndex(def.rt.id, variantIndex, side, false);
+        sideregions[index] = atlas.get(tex);
+        sideregions[index + 1] = atlas.get(texOpaque);
     }
     if (variant.model.type == BlockModelType::CUSTOM) {
         auto model = assets.require<model::Model>(variant.model.name);
@@ -63,11 +67,11 @@ static void refresh_variant(
 }
 
 void ContentGfxCache::refresh(const Block& def, const Atlas& atlas) {
-    refresh_variant(assets, def, def.defaults, 0, sideregions, atlas, settings, models);
+    refreshVariant(def, def.defaults, 0, atlas);
     if (def.variants) {
         const auto& variants = def.variants->variants;
         for (int i = 1; i < variants.size() - 1; i++) {
-            refresh_variant(assets, def, variants[i], i, sideregions, atlas, settings, models);
+            refreshVariant(def, variants[i], i, atlas);
         }
         def.variants->variants.at(0) = def.defaults;
     }
@@ -75,7 +79,11 @@ void ContentGfxCache::refresh(const Block& def, const Atlas& atlas) {
 
 void ContentGfxCache::refresh() {
     auto indices = content.getIndices();
-    sideregions = std::make_unique<UVRegion[]>(indices->blocks.count() * 6 * MAX_VARIANTS);
+    size_t size = indices->blocks.count() * GFXC_SIDES * GFXC_MAX_VARIANTS * 2;
+
+    logger.info() << "uv cache size is " << (sizeof(UVRegion) * size) << " B";
+
+    sideregions = std::make_unique<UVRegion[]>(size);
     const auto& atlas = assets.require<Atlas>("blocks");
 
     const auto& blocks = indices->blocks.getIterable();

src/frontend/ContentGfxCache.hpp

@@ -14,9 +14,11 @@ class Assets;
 class Atlas;
 class Block;
 struct UVRegion;
+struct Variant;
 struct GraphicsSettings;
 
-inline constexpr int MAX_VARIANTS = 16;
+inline constexpr int GFXC_MAX_VARIANTS = 16;
+inline constexpr int GFXC_SIDES = 6;
 
 class ContentGfxCache {
     const Content& content;
@@ -26,6 +28,13 @@ class ContentGfxCache {
     // array of block sides uv regions (6 per block)
     std::unique_ptr<UVRegion[]> sideregions;
     std::unordered_map<blockid_t, model::Model> models;
+
+    void refreshVariant(
+        const Block& def,
+        const Variant& variant,
+        uint8_t variantIndex,
+        const Atlas& atlas
+    );
 public:
     ContentGfxCache(
         const Content& content,
@@ -34,8 +43,14 @@ public:
     );
     ~ContentGfxCache();
 
-    inline const UVRegion& getRegion(blockid_t id, uint8_t variant, int side) const {
-        return sideregions[(id * 6 + side) * MAX_VARIANTS + variant];
+    static inline size_t getRegionIndex(
+        blockid_t id, uint8_t variant, int side, bool opaque
+    ) {
+        return ((id * GFXC_SIDES + side) * GFXC_MAX_VARIANTS + variant) * 2 + opaque;
+    }
+
+    inline const UVRegion& getRegion(blockid_t id, uint8_t variant, int side, bool dense) const {
+        return sideregions[getRegionIndex(id, variant, side, !dense)];
     }
 
     const model::Model& getModel(blockid_t id) const;

src/graphics/core/Mesh.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <vector>
+
 #include "MeshData.hpp"
 
 
@@ -8,25 +10,32 @@ struct MeshStats {
     static int drawCalls;
 };
 
+struct IndexBufferData {
+    const uint32_t* indices;
+    size_t indicesCount;
+};
+
 template <typename VertexStructure>
 class Mesh {
+    struct IndexBuffer {
+        unsigned int ibo;
+        size_t indexCount;
+    };
     unsigned int vao;
     unsigned int vbo;
-    unsigned int ibo;
+    std::vector<IndexBuffer> ibos;
     size_t vertexCount;
-    size_t indexCount;
 public:
     explicit Mesh(const MeshData<VertexStructure>& data);
 
     Mesh(
         const VertexStructure* vertexBuffer,
         size_t vertices,
-        const uint32_t* indexBuffer,
-        size_t indices
+        std::vector<IndexBufferData> indices
     );
 
     Mesh(const VertexStructure* vertexBuffer, size_t vertices)
-        : Mesh<VertexStructure>(vertexBuffer, vertices, nullptr, 0) {};
+        : Mesh<VertexStructure>(vertexBuffer, vertices, {}) {};
 
     ~Mesh();
 
@@ -34,18 +43,21 @@ public:
     /// attributes
     /// @param vertexBuffer vertex data buffer
     /// @param vertexCount number of vertices in new buffer
-    /// @param indexBuffer indices buffer
-    /// @param indexCount number of values in indices buffer
+    /// @param indices indices buffer
     void reload(
         const VertexStructure* vertexBuffer,
         size_t vertexCount,
-        const uint32_t* indexBuffer = nullptr,
-        size_t indexCount = 0
+        const std::vector<IndexBufferData>& indices
     );
 
+    void reload(const VertexStructure* vertexBuffer, size_t vertexCount) {
+        static const std::vector<IndexBufferData> indices {};
+        reload(vertexBuffer, vertexCount, indices);
+    }
+
     /// @brief Draw mesh with specified primitives type
-    /// @param primitive primitives type
-    void draw(unsigned int primitive) const;
+    /// @param iboIndex index of used element buffer
+    void draw(unsigned int primitive, int iboIndex = 0) const;
 
     /// @brief Draw mesh as triangles
     void draw() const;

src/graphics/core/Mesh.inl

@@ -11,13 +11,21 @@ inline constexpr size_t calc_size(const VertexAttribute attrs[]) {
     return vertexSize;
 }
 
+template <typename VertexStructure>
+inline std::vector<IndexBufferData> convert_to_ibd(const MeshData<VertexStructure>& data) {
+    std::vector<IndexBufferData> indices;
+    for (const auto& buffer : data.indices) {
+        indices.push_back(IndexBufferData {buffer.data(), buffer.size()});
+    }
+    return indices;
+}
+
 template <typename VertexStructure>
 Mesh<VertexStructure>::Mesh(const MeshData<VertexStructure>& data)
     : Mesh(
           data.vertices.data(),
           data.vertices.size(),
-          data.indices.data(),
-          data.indices.size()
+          convert_to_ibd<VertexStructure>(data)
       ) {
 }
 
@@ -25,10 +33,9 @@ template <typename VertexStructure>
 Mesh<VertexStructure>::Mesh(
     const VertexStructure* vertexBuffer,
     size_t vertices,
-    const uint32_t* indexBuffer,
-    size_t indices
+    std::vector<IndexBufferData> indices
 )
-    : vao(0), vbo(0), ibo(0), vertexCount(0), indexCount(0) {
+    : vao(0), vbo(0), ibos(), vertexCount(0) {
     static_assert(
         calc_size(VertexStructure::ATTRIBUTES) == sizeof(VertexStructure)
     );
@@ -39,8 +46,9 @@ Mesh<VertexStructure>::Mesh(
     glGenVertexArrays(1, &vao);
     glGenBuffers(1, &vbo);
 
-    reload(vertexBuffer, vertices, indexBuffer, indices);
+    reload(vertexBuffer, vertices, std::move(indices));
 
+    glBindVertexArray(vao);
     // attributes
     int offset = 0;
     for (int i = 0; attrs[i].count; i++) {
@@ -65,8 +73,8 @@ Mesh<VertexStructure>::~Mesh() {
     MeshStats::meshesCount--;
     glDeleteVertexArrays(1, &vao);
     glDeleteBuffers(1, &vbo);
-    if (ibo != 0) {
-        glDeleteBuffers(1, &ibo);
+    for (int i = ibos.size() - 1; i >= 0; i--) {
+        glDeleteBuffers(1, &ibos[i].ibo);
     }
 }
 
@@ -74,11 +82,9 @@ template <typename VertexStructure>
 void Mesh<VertexStructure>::reload(
     const VertexStructure* vertexBuffer,
     size_t vertexCount,
-    const uint32_t* indexBuffer,
-    size_t indexCount
+    const std::vector<IndexBufferData>& indices
 ) {
     this->vertexCount = vertexCount;
-    this->indexCount = indexCount;
     glBindVertexArray(vao);
     glBindBuffer(GL_ARRAY_BUFFER, vbo);
     if (vertexBuffer != nullptr && vertexCount != 0) {
@@ -92,30 +98,45 @@ void Mesh<VertexStructure>::reload(
         glBufferData(GL_ARRAY_BUFFER, 0, {}, GL_STREAM_DRAW);
     }
 
-    if (indexBuffer != nullptr && indexCount != 0) {
-        if (ibo == 0) glGenBuffers(1, &ibo);
-        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
+    for (int i = indices.size(); i < ibos.size(); i++) {
+        glDeleteBuffers(1, &ibos[i].ibo);
+    }
+    ibos.clear();
+
+    for (int i = 0; i < indices.size(); i++) {
+        const auto& indexBuffer = indices[i];
+        ibos.push_back(IndexBuffer {0, 0});
+        glGenBuffers(1, &ibos[i].ibo);
+        ibos[i].indexCount = indexBuffer.indicesCount;
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibos[i].ibo);
         glBufferData(
             GL_ELEMENT_ARRAY_BUFFER,
-            sizeof(uint32_t) * indexCount,
-            indexBuffer,
+            sizeof(uint32_t) * indexBuffer.indicesCount,
+            indexBuffer.indices,
             GL_STATIC_DRAW
         );
-    } else if (ibo != 0) {
-        glDeleteBuffers(1, &ibo);
     }
+    glBindVertexArray(0);
 }
 
 template <typename VertexStructure>
-void Mesh<VertexStructure>::draw(unsigned int primitive) const {
+void Mesh<VertexStructure>::draw(unsigned int primitive, int iboIndex) const {
     MeshStats::drawCalls++;
-    glBindVertexArray(vao);
-    if (ibo != 0) {
-        glDrawElements(primitive, indexCount, GL_UNSIGNED_INT, nullptr);
-    } else {
+    
+    if (!ibos.empty()) {
+        if (iboIndex < ibos.size()) {
+            glBindVertexArray(vao);
+            glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibos[iboIndex].ibo);
+            glDrawElements(
+                primitive, ibos.at(iboIndex).indexCount, GL_UNSIGNED_INT, nullptr
+            );
+            glBindVertexArray(0);
+        }
+    } else if (vertexCount > 0) {
+        glBindVertexArray(vao);
         glDrawArrays(primitive, 0, vertexCount);
+        glBindVertexArray(0);
     }
-    glBindVertexArray(0);
 }
 
 template <typename VertexStructure>

src/graphics/core/MeshData.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <vector>
 #include <stdexcept>
 
 #include "typedefs.hpp"
@@ -40,7 +41,7 @@ struct VertexAttribute {
 template<typename VertexStructure>
 struct MeshData {
     util::Buffer<VertexStructure> vertices;
-    util::Buffer<uint32_t> indices;
+    std::vector<util::Buffer<uint32_t>> indices;
     util::Buffer<VertexAttribute> attrs;
 
     MeshData() = default;
@@ -50,7 +51,7 @@ struct MeshData {
     /// @param attrs vertex attribute sizes (must be null-terminated) 
     MeshData(
         util::Buffer<VertexStructure> vertices,
-        util::Buffer<uint32_t> indices,
+        std::vector<util::Buffer<uint32_t>> indices,
         util::Buffer<VertexAttribute> attrs
     ) : vertices(std::move(vertices)),
         indices(std::move(indices)),

src/graphics/render/BlocksPreview.cpp

@@ -27,9 +27,10 @@ std::unique_ptr<ImageData> BlocksPreview::draw(
 ){
     display::clear();
     blockid_t id = def.rt.id;
-    const UVRegion texfaces[6]{cache.getRegion(id, 0, 0), cache.getRegion(id, 0, 1),
-                               cache.getRegion(id, 0, 2), cache.getRegion(id, 0, 3),
-                               cache.getRegion(id, 0, 4), cache.getRegion(id, 0, 5)};
+    const UVRegion texfaces[6] {
+        cache.getRegion(id, 0, 0, true), cache.getRegion(id, 0, 1, true),
+        cache.getRegion(id, 0, 2, true), cache.getRegion(id, 0, 3, true),
+        cache.getRegion(id, 0, 4, true), cache.getRegion(id, 0, 5, true)};
 
     glm::vec3 offset(0.1f, 0.5f, 0.1f);
     switch (def.defaults.model.type) {

src/graphics/render/BlocksRenderer.cpp

@@ -20,6 +20,7 @@ BlocksRenderer::BlocksRenderer(
 ) : content(content),
     vertexBuffer(std::make_unique<ChunkVertex[]>(capacity)),
     indexBuffer(std::make_unique<uint32_t[]>(capacity)),
+    denseIndexBuffer(std::make_unique<uint32_t[]>(capacity)),
     vertexCount(0),
     vertexOffset(0),
     indexCount(0),
@@ -475,8 +476,10 @@ glm::vec4 BlocksRenderer::pickSoftLight(
 }
 
 void BlocksRenderer::render(
-    const voxel* voxels, int beginEnds[256][2]
+    const voxel* voxels, const int beginEnds[256][2]
 ) {
+    bool denseRender = this->denseRender;
+    bool densePass = this->densePass;
     for (const auto drawGroup : *content.drawGroups) {
         int begin = beginEnds[drawGroup][0];
         if (begin == 0) {
@@ -493,16 +496,19 @@ void BlocksRenderer::render(
             if (id == 0 || variant.drawGroup != drawGroup || state.segment) {
                 continue;
             }
+            if (denseRender != (variant.culling == CullingMode::OPTIONAL)) {
+                continue;
+            }
             if (def.translucent) {
                 continue;
             }
             const UVRegion texfaces[6] {
-                cache.getRegion(id, variantId, 0),
-                cache.getRegion(id, variantId, 1),
-                cache.getRegion(id, variantId, 2),
-                cache.getRegion(id, variantId, 3),
-                cache.getRegion(id, variantId, 4),
-                cache.getRegion(id, variantId, 5)
+                cache.getRegion(id, variantId, 0, densePass),
+                cache.getRegion(id, variantId, 1, densePass),
+                cache.getRegion(id, variantId, 2, densePass),
+                cache.getRegion(id, variantId, 3, densePass),
+                cache.getRegion(id, variantId, 4, densePass),
+                cache.getRegion(id, variantId, 5, densePass)
             };
             int x = i % CHUNK_W;
             int y = i / (CHUNK_D * CHUNK_W);
@@ -513,16 +519,19 @@ void BlocksRenderer::render(
                               def.ambientOcclusion);
                     break;
                 case BlockModelType::XSPRITE: {
+                    if (!denseRender)
                     blockXSprite(x, y, z, glm::vec3(1.0f),
                                 texfaces[FACE_MX], texfaces[FACE_MZ], 1.0f);
                     break;
                 }
                 case BlockModelType::AABB: {
+                    if (!denseRender)
                     blockAABB({x, y, z}, texfaces, &def, vox.state.rotation,
                               !def.shadeless, def.ambientOcclusion);
                     break;
                 }
                 case BlockModelType::CUSTOM: {
+                    if (!denseRender)
                     blockCustomModel(
                         {x, y, z},
                         def,
@@ -550,6 +559,8 @@ SortingMeshData BlocksRenderer::renderTranslucent(
     AABB aabb {};
     bool aabbInit = false;
     size_t totalSize = 0;
+
+    bool densePass = this->densePass;
     for (const auto drawGroup : *content.drawGroups) {
         int begin = beginEnds[drawGroup][0];
         if (begin == 0) {
@@ -570,12 +581,12 @@ SortingMeshData BlocksRenderer::renderTranslucent(
                 continue;
             }
             const UVRegion texfaces[6] {
-                cache.getRegion(id, variantId, 0),
-                cache.getRegion(id, variantId, 1),
-                cache.getRegion(id, variantId, 2),
-                cache.getRegion(id, variantId, 3),
-                cache.getRegion(id, variantId, 4),
-                cache.getRegion(id, variantId, 5)
+                cache.getRegion(id, variantId, 0, densePass),
+                cache.getRegion(id, variantId, 1, densePass),
+                cache.getRegion(id, variantId, 2, densePass),
+                cache.getRegion(id, variantId, 3, densePass),
+                cache.getRegion(id, variantId, 4, densePass),
+                cache.getRegion(id, variantId, 5, densePass)
             };
             int x = i % CHUNK_W;
             int y = i / (CHUNK_D * CHUNK_W);
@@ -700,21 +711,45 @@ void BlocksRenderer::build(const Chunk* chunk, const Chunks* chunks) {
     vertexCount = 0;
     vertexOffset = indexCount = 0;
 
+    denseRender = false;
+    densePass = false;
+
     sortingMesh = renderTranslucent(voxels, beginEnds);
 
     overflow = false;
     vertexCount = 0;
     vertexOffset = 0;
     indexCount = 0;
+    denseIndexCount = 0;
 
+    denseRender = false; //settings.graphics.denseRender.get();
+    densePass = false;
+    render(voxels, beginEnds);
+
+    size_t endIndex = indexCount;
+    
+    denseRender = true;
+    densePass = true;
+    render(voxels, beginEnds);
+
+    denseIndexCount = indexCount;
+    for (size_t i = 0; i < denseIndexCount; i++) {
+        denseIndexBuffer[i] = indexBuffer[i];
+    }
+
+    indexCount = endIndex;
+    densePass = false;
     render(voxels, beginEnds);
 }
 
 ChunkMeshData BlocksRenderer::createMesh() {
-    return ChunkMeshData{
+    return ChunkMeshData {
         MeshData(
             util::Buffer(vertexBuffer.get(), vertexCount),
-            util::Buffer(indexBuffer.get(), indexCount),
+            std::vector<util::Buffer<uint32_t>> {
+                util::Buffer(indexBuffer.get(), indexCount),
+                util::Buffer(denseIndexBuffer.get(), denseIndexCount),
+            },
             util::Buffer(
                 ChunkVertex::ATTRIBUTES, sizeof(ChunkVertex::ATTRIBUTES) / sizeof(VertexAttribute)
             )
@@ -727,10 +762,19 @@ ChunkMesh BlocksRenderer::render(const Chunk *chunk, const Chunks *chunks) {
     build(chunk, chunks);
 
     return ChunkMesh{std::make_unique<Mesh<ChunkVertex>>(
-        vertexBuffer.get(), vertexCount, indexBuffer.get(), indexCount
+        vertexBuffer.get(), vertexCount, 
+        std::vector<IndexBufferData> {
+            IndexBufferData {indexBuffer.get(), indexCount},
+            IndexBufferData {denseIndexBuffer.get(), denseIndexCount},
+        }
     ), std::move(sortingMesh)};
 }
 
 VoxelsVolume* BlocksRenderer::getVoxelsBuffer() const {
     return voxelsBuffer.get();
 }
+
+size_t BlocksRenderer::getMemoryConsumption() const {
+    size_t volume = voxelsBuffer->getW() * voxelsBuffer->getH() * voxelsBuffer->getD();
+    return capacity * (sizeof(ChunkVertex) + sizeof(uint32_t) * 2) + volume * (sizeof(voxel) + sizeof(light_t));
+}

src/graphics/render/BlocksRenderer.hpp

@@ -26,13 +26,17 @@ class BlocksRenderer {
     const Content& content;
     std::unique_ptr<ChunkVertex[]> vertexBuffer;
     std::unique_ptr<uint32_t[]> indexBuffer;
+    std::unique_ptr<uint32_t[]> denseIndexBuffer;
     size_t vertexCount;
     size_t vertexOffset;
     size_t indexCount;
+    size_t denseIndexCount;
     size_t capacity;
     int voxelBufferPadding = 2;
     bool overflow = false;
     bool cancelled = false;
+    bool densePass = false;
+    bool denseRender = false;
     const Chunk* chunk = nullptr;
     std::unique_ptr<VoxelsVolume> voxelsBuffer;
 
@@ -135,10 +139,12 @@ class BlocksRenderer {
         if ((otherDrawGroup && (otherDrawGroup != variant.drawGroup)) || !blockVariant.rt.solid) {
             return true;
         }
-        if ((variant.culling == CullingMode::DISABLED ||
-             (variant.culling == CullingMode::OPTIONAL &&
-              settings.graphics.denseRender.get())) &&
-            vox.id == def.rt.id) {
+        if (densePass) {
+            return variant.culling == CullingMode::OPTIONAL;
+        } else if (variant.culling == CullingMode::OPTIONAL) {
+            return false;
+        }
+        if (variant.culling == CullingMode::DISABLED && vox.id == def.rt.id) {
             return true;
         }
         return !vox.id;
@@ -149,7 +155,7 @@ class BlocksRenderer {
     glm::vec4 pickSoftLight(const glm::ivec3& coord, const glm::ivec3& right, const glm::ivec3& up) const;
     glm::vec4 pickSoftLight(float x, float y, float z, const glm::ivec3& right, const glm::ivec3& up) const;
     
-    void render(const voxel* voxels, int beginEnds[256][2]);
+    void render(const voxel* voxels, const int beginEnds[256][2]);
     SortingMeshData renderTranslucent(const voxel* voxels, int beginEnds[256][2]);
 public:
     BlocksRenderer(
@@ -165,6 +171,8 @@ public:
     ChunkMeshData createMesh();
     VoxelsVolume* getVoxelsBuffer() const;
 
+    size_t getMemoryConsumption() const;
+
     bool isCancelled() const {
         return cancelled;
     }

src/graphics/render/ChunksRenderer.cpp

@@ -87,10 +87,12 @@ ChunksRenderer::ChunksRenderer(
         level->content, cache, settings
     );
     logger.info() << "created " << threadPool.getWorkersCount() << " workers";
+    logger.info() << "memory consumption is " 
+        << renderer->getMemoryConsumption() * threadPool.getWorkersCount()
+        << " B";
 }
 
-ChunksRenderer::~ChunksRenderer() {
-}
+ChunksRenderer::~ChunksRenderer() = default;
 
 const Mesh<ChunkVertex>* ChunksRenderer::render(
     const std::shared_ptr<Chunk>& chunk, bool important
@@ -183,29 +185,47 @@ const Mesh<ChunkVertex>* ChunksRenderer::retrieveChunk(
 }
 
 void ChunksRenderer::drawChunksShadowsPass(
-    const Camera& camera, Shader& shader
+    const Camera& camera, Shader& shader, const Camera& playerCamera
 ) {
+    Frustum frustum;
+    frustum.update(camera.getProjView());
+
     const auto& atlas = assets.require<Atlas>("blocks");
 
     atlas.getTexture()->bind();
 
+    auto denseDistance = settings.graphics.denseRenderDistance.get();
+    auto denseDistance2 = denseDistance * denseDistance;
+
     for (const auto& chunk : chunks.getChunks()) {
         if (chunk == nullptr) {
             continue;
         }
+        glm::ivec2 pos {chunk->x, chunk->z};
         const auto& found = meshes.find({chunk->x, chunk->z});
         if (found == meshes.end()) {
             continue;
         }
-        auto mesh = found->second.mesh.get();
-        if (mesh) {
-            glm::vec3 coord(
-                chunk->x * CHUNK_W + 0.5f, 0.5f, chunk->z * CHUNK_D + 0.5f
-            );
-            glm::mat4 model = glm::translate(glm::mat4(1.0f), coord);
-            shader.uniformMatrix("u_model", model);
-            mesh->draw();
+
+        glm::vec3 coord(
+            pos.x * CHUNK_W + 0.5f, 0.5f, pos.y * CHUNK_D + 0.5f
+        );
+
+        glm::vec3 min(chunk->x * CHUNK_W, chunk->bottom, chunk->z * CHUNK_D);
+        glm::vec3 max(
+            chunk->x * CHUNK_W + CHUNK_W,
+            chunk->top,
+            chunk->z * CHUNK_D + CHUNK_D
+        );
+
+        if (!frustum.isBoxVisible(min, max)) {
+            continue;
         }
+        glm::mat4 model = glm::translate(glm::mat4(1.0f), coord);
+        shader.uniformMatrix("u_model", model);
+        found->second.mesh->draw(GL_TRIANGLES, 
+            glm::distance2(playerCamera.position * glm::vec3(1, 0, 1), 
+                           (min + max) * 0.5f * glm::vec3(1, 0, 1)) < denseDistance2);
     }
 }
 
@@ -242,6 +262,9 @@ void ChunksRenderer::drawChunks(
     visibleChunks = 0;
     shader.uniform1i("u_alphaClip", true);
 
+    auto denseDistance = settings.graphics.denseRenderDistance.get();
+    auto denseDistance2 = denseDistance * denseDistance;
+
     // TODO: minimize draw calls number
     for (int i = indices.size()-1; i >= 0; i--) {
         auto& chunk = chunks.getChunks()[indices[i].index];
@@ -253,7 +276,8 @@ void ChunksRenderer::drawChunks(
             );
             glm::mat4 model = glm::translate(glm::mat4(1.0f), coord);
             shader.uniformMatrix("u_model", model);
-            mesh->draw();
+            mesh->draw(GL_TRIANGLES, glm::distance2(camera.position * glm::vec3(1, 0, 1), 
+                (coord + glm::vec3(CHUNK_W * 0.5f, 0.0f, CHUNK_D * 0.5f))) < denseDistance2);
             visibleChunks++;
         }
     }

src/graphics/render/ChunksRenderer.hpp

@@ -73,7 +73,9 @@ public:
         const std::shared_ptr<Chunk>& chunk, bool important
     );
 
-    void drawChunksShadowsPass(const Camera& camera, Shader& shader);
+    void drawChunksShadowsPass(
+        const Camera& camera, Shader& shader, const Camera& playerCamera
+    );
 
     void drawChunks(const Camera& camera, Shader& shader);
 

src/graphics/render/WorldRenderer.cpp

@@ -220,8 +220,6 @@ void WorldRenderer::renderLevel(
     if (hudVisible) {
         renderLines(camera, linesShader, ctx);
     }
-    shader.use();
-    chunks->drawSortedMeshes(camera, shader);
 
     if (!pause) {
         scripting::on_frontend_render();
@@ -400,14 +398,13 @@ void WorldRenderer::generateShadowsMap(
     shadowCamera.setProjection(glm::ortho(min.x, max.x, min.y, max.y, 0.1f, 1000.0f));
 
     {
-        frustumCulling->update(shadowCamera.getProjView());
         auto sctx = pctx.sub();
         sctx.setDepthTest(true);
         sctx.setCullFace(true);
         sctx.setViewport({resolution, resolution});
         shadowMap.bind();
         setupWorldShader(shadowsShader, shadowCamera, settings, 0.0f);
-        chunks->drawChunksShadowsPass(shadowCamera, shadowsShader);
+        chunks->drawChunksShadowsPass(shadowCamera, shadowsShader, camera);
         shadowMap.unbind();
     }
 }
@@ -432,6 +429,7 @@ void WorldRenderer::draw(
 
     auto& mainShader = assets.require<Shader>("main");
     auto& entityShader = assets.require<Shader>("entity");
+    auto& translucentShader = assets.require<Shader>("translucent");
     auto& deferredShader = assets.require<PostEffect>("deferred_lighting").getShader();
     const auto& settings = engine.getSettings();
 
@@ -464,6 +462,7 @@ void WorldRenderer::draw(
         mainShader.recompile();
         entityShader.recompile();
         deferredShader.recompile();
+        translucentShader.recompile();
         prevCTShaderSettings = currentSettings;
     }
 
@@ -526,6 +525,7 @@ void WorldRenderer::draw(
     {
         DrawContext ctx = pctx.sub();
         ctx.setDepthTest(true);
+
         if (gbufferPipeline) {
             postProcessing.bindDepthBuffer();
         } else {
@@ -534,6 +534,16 @@ void WorldRenderer::draw(
         // Drawing background sky plane
         skybox->draw(ctx, camera, assets, worldInfo.daytime, clouds);
 
+        {
+            auto sctx = ctx.sub();
+            sctx.setCullFace(true);
+            skybox->bind();
+            translucentShader.use();
+            setupWorldShader(translucentShader, camera, settings, fogFactor);
+            chunks->drawSortedMeshes(camera, translucentShader);
+            skybox->unbind();
+        }
+
         entityShader.use();
         setupWorldShader(entityShader, camera, settings, fogFactor);
 
@@ -553,8 +563,7 @@ void WorldRenderer::draw(
         glBindFramebuffer(GL_FRAMEBUFFER, 0);
     }
     postProcessing.render(pctx, assets, timer, camera);
-
-    skybox->unbind();
+    
     if (player.currentCamera == player.fpCamera) {
         DrawContext ctx = pctx.sub();
         ctx.setDepthTest(true);

src/graphics/render/commons.hpp

@@ -47,7 +47,7 @@ struct ChunkMeshData {
 };
 
 struct ChunkMesh {
-    std::unique_ptr<Mesh<ChunkVertex> > mesh;
+    std::unique_ptr<Mesh<ChunkVertex>> mesh;
     SortingMeshData sortingMeshData;
     std::unique_ptr<Mesh<ChunkVertex> > sortedMesh = nullptr;
 };

src/io/settings_io.cpp

@@ -77,6 +77,7 @@ SettingsHandler::SettingsHandler(EngineSettings& settings) {
     builder.add("advanced-render", &settings.graphics.advancedRender);
     builder.add("ssao", &settings.graphics.ssao);
     builder.add("shadows-quality", &settings.graphics.shadowsQuality);
+    builder.add("dense-render-distance", &settings.graphics.denseRenderDistance);
 
     builder.section("ui");
     builder.add("language", &settings.ui.language);

src/settings.hpp

@@ -81,6 +81,8 @@ struct GraphicsSettings {
     FlagSetting ssao {true};
     /// @brief Shadows quality
     IntegerSetting shadowsQuality {0, 0, 3};
+    /// @brief Dense render distance
+    IntegerSetting denseRenderDistance {56, 0, 10'000};
 };
 
 struct DebugSettings {