many emitters test

res/content/base/blocks/leaves.json

@@ -3,5 +3,24 @@
     "material": "base:grass",
     "draw-group": 5,
     "culling": "optional",
+    "particles": {
+        "lifetime": 4.0,
+        "spawn_interval": 1000.0,
+        "acceleration": [0, -0.1, 0],
+        "velocity": [0.2, -2.5, 0.3],
+        "explosion": [0, 0, 0],
+        "collision": false,
+        "size": [0.3, 0.3, 0.3],
+        "size_spread": 0.2,
+        "spawn_shape": "box",
+        "spawn_spread": [0.2, 0.2, 0.2],
+        "angle_spread": 1.0,
+        "min_angular_vel": 0.5,
+        "max_angular_vel": 2.0,
+        "lighting": true,
+        "frames": [
+            "particles:leaf_0"
+        ]
+    },
     "base:durability": 0.7
 }