diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 6af90077..60ad52a6 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -42,7 +42,7 @@ jobs:
           cp -r build/* packaged/
         working-directory: ${{ github.workspace }}
       - name: Run tests
-        run: ctest --test-dir build
+        run: ctest --output-on-failure --test-dir build
       - uses: actions/upload-artifact@v2
         with:
           name: Windows-Build
diff --git a/res/scripts/classes.lua b/res/scripts/classes.lua
index 1c2b0cba..3c23fdc4 100644
--- a/res/scripts/classes.lua
+++ b/res/scripts/classes.lua
@@ -22,6 +22,9 @@ local Camera = {__index={
 local wrappers = {}
 
 cameras.get = function(name)
+    if type(name) == 'number' then
+        return cameras.get(cameras.name(name))
+    end
     local wrapper = wrappers[name]
     if wrapper ~= nil then
         return wrapper
diff --git a/src/graphics/render/BlocksPreview.cpp b/src/graphics/render/BlocksPreview.cpp
index bf6b2a10..619266bd 100644
--- a/src/graphics/render/BlocksPreview.cpp
+++ b/src/graphics/render/BlocksPreview.cpp
@@ -102,6 +102,7 @@ std::unique_ptr<ImageData> BlocksPreview::draw(
             }
             break;
         case BlockModel::xsprite: {
+            shader->uniformMatrix("u_apply", glm::translate(glm::mat4(1.0f), offset));
             glm::vec3 right = glm::normalize(glm::vec3(1.f, 0.f, -1.f));
             batch->sprite(
                 right*float(size)*0.43f+glm::vec3(0, size*0.4f, 0), 
diff --git a/src/logic/scripting/lua/lib__skeleton.cpp b/src/logic/scripting/lua/lib__skeleton.cpp
index 9c6295d2..1e0365b7 100644
--- a/src/logic/scripting/lua/lib__skeleton.cpp
+++ b/src/logic/scripting/lua/lib__skeleton.cpp
@@ -62,8 +62,6 @@ static int l_set_matrix(lua::State* L) {
 static int l_get_texture(lua::State* L) {
     if (auto entity = get_entity(L, 1)) {
         auto& skeleton = entity->getSkeleton();
-        skeleton.textures[lua::require_string(L, 2)] =
-            lua::require_string(L, 3);
         const auto& found = skeleton.textures.find(lua::require_string(L, 2));
         if (found != skeleton.textures.end()) {
             return lua::pushstring(L, found->second);
diff --git a/src/util/stringutil.cpp b/src/util/stringutil.cpp
index c494a759..97ca4786 100644
--- a/src/util/stringutil.cpp
+++ b/src/util/stringutil.cpp
@@ -116,20 +116,22 @@ const utf_t utf[] = {
 };
 
 inline uint utf8_len(ubyte cp) {
-    uint len = 0;
-    for (const utf_t* u = utf; u->mask; ++u) {
-        if ((cp >= u->beg) && (cp <= u->end)) {
-            break;
-        }
-        ++len;
+    if ((cp & 0x80) == 0) {
+        return 1;
     }
-    if (len > 4) /* Out of bounds */
-        throw std::runtime_error("utf-8 decode error");
-
-    return len;
+    if ((cp & 0xE0) == 0xC0) {
+        return 2;
+    }
+    if ((cp & 0xF0) == 0xE0) {
+        return 3;
+    }
+    if ((cp & 0xF8) == 0xF0) {
+        return 4;
+    }
+    return 0;
 }
 
-extern uint32_t util::decode_utf8(uint& size, const char* chr) {
+uint32_t util::decode_utf8(uint& size, const char* chr) {
     size = utf8_len(*chr);
     int shift = utf[0].bits_stored * (size - 1);
     uint32_t code = (*chr++ & utf[size].mask) << shift;
@@ -141,11 +143,26 @@ extern uint32_t util::decode_utf8(uint& size, const char* chr) {
     return code;
 }
 
-std::string util::wstr2str_utf8(const std::wstring& ws) {
+size_t util::crop_utf8(std::string_view s, size_t maxSize) {
+    size_t pos = 0;
+    uint size = 0;
+    while (pos < s.length()) {
+        decode_utf8(size, s.data() + pos);
+        if (pos + size > maxSize) {
+            return pos;
+        }
+        pos += size;
+    }
+    return pos;
+}
+
+template<class C>
+std::string xstr2str_utf8(const std::basic_string<C>& xs) {
     std::vector<char> chars;
-    char buffer[4];
-    for (wchar_t wc : ws) {
-        uint size = encode_utf8((uint)wc, (ubyte*)buffer);
+    ubyte buffer[4];
+    for (C xc : xs) {
+        uint size = util::encode_utf8(
+            static_cast<uint>(xc), buffer);
         for (uint i = 0; i < size; i++) {
             chars.push_back(buffer[i]);
         }
@@ -153,15 +170,32 @@ std::string util::wstr2str_utf8(const std::wstring& ws) {
     return std::string(chars.data(), chars.size());
 }
 
-std::wstring util::str2wstr_utf8(const std::string& s) {
-    std::vector<wchar_t> chars;
+std::string util::wstr2str_utf8(const std::wstring& ws) {
+    return xstr2str_utf8(ws);
+}
+
+std::string util::u32str2str_utf8(const std::u32string& ws) {
+    return xstr2str_utf8(ws);
+}
+
+template<class C>
+std::basic_string<C> str2xstr_utf8(const std::string& s) {
+    std::vector<C> chars;
     size_t pos = 0;
     uint size = 0;
     while (pos < s.length()) {
-        chars.push_back(decode_utf8(size, &s.at(pos)));
+        chars.push_back(util::decode_utf8(size, &s.at(pos)));
         pos += size;
     }
-    return std::wstring(chars.data(), chars.size());
+    return std::basic_string<C>(chars.data(), chars.size());
+}
+
+std::wstring util::str2wstr_utf8(const std::string& s) {
+    return str2xstr_utf8<wchar_t>(s);
+}
+
+std::u32string util::str2u32str_utf8(const std::string& s) {
+    return str2xstr_utf8<char32_t>(s);
 }
 
 bool util::is_integer(const std::string& text) {
diff --git a/src/util/stringutil.hpp b/src/util/stringutil.hpp
index 54a0a5e2..38e7cf89 100644
--- a/src/util/stringutil.hpp
+++ b/src/util/stringutil.hpp
@@ -17,8 +17,33 @@ namespace util {
 
     uint encode_utf8(uint32_t c, ubyte* bytes);
     uint32_t decode_utf8(uint& size, const char* bytes);
+
+    /// @brief Encode raw wstring to UTF-8
+    /// @param ws source raw wstring
+    /// @return new UTF-8 encoded string
     std::string wstr2str_utf8(const std::wstring& ws);
+
+    /// @brief Decode UTF-8 string
+    /// @param s source encoded string
+    /// @return new raw decoded wstring
     std::wstring str2wstr_utf8(const std::string& s);
+
+    /// @brief Encode raw u32string to UTF-8
+    /// @param ws source raw wstring
+    /// @return new UTF-8 encoded string
+    std::string u32str2str_utf8(const std::u32string& ws);
+
+    /// @brief Decode UTF-8 string
+    /// @param s source encoded string
+    /// @return new raw decoded u32string
+    std::u32string str2u32str_utf8(const std::string& s);
+
+    /// @brief Calculated length of UTF-8 encoded string that fits into maxSize
+    /// @param s source UTF-8 encoded string view
+    /// @param maxSize max encoded string length after crop
+    /// @return cropped string size (less or equal to maxSize)
+    size_t crop_utf8(std::string_view s, size_t maxSize);
+    
     bool is_integer(const std::string& text);
     bool is_integer(const std::wstring& text);
     bool is_valid_filename(const std::wstring& name);
diff --git a/test/util/stringutil.cpp b/test/util/stringutil.cpp
new file mode 100644
index 00000000..7bd0f85c
--- /dev/null
+++ b/test/util/stringutil.cpp
@@ -0,0 +1,17 @@
+#include "util/stringutil.hpp"
+
+#include <gtest/gtest.h>
+
+TEST(stringutil, crop_utf8) {
+    // Project source files must be UTF-8 encoded
+    std::string str = u8"пример";
+    str = str.substr(0, util::crop_utf8(str, 7));
+    EXPECT_EQ(str, u8"при");
+}
+
+TEST(stringutil, utf8) {
+    std::string str = u8"テキストデモ";
+    auto u32str = util::str2u32str_utf8(str);
+    std::string str2 = util::u32str2str_utf8(u32str);
+    EXPECT_EQ(str, str2);
+}