diff --git a/leenkx/Sources/iron/object/Uniforms.hx b/leenkx/Sources/iron/object/Uniforms.hx
index 022a777..473958d 100644
--- a/leenkx/Sources/iron/object/Uniforms.hx
+++ b/leenkx/Sources/iron/object/Uniforms.hx
@@ -1109,6 +1109,26 @@ class Uniforms {
 				case "_texUnpack": {
 					f = texUnpack != null ? texUnpack : 1.0;
 				}
+				#if lnx_particles
+				case "_particleSizeRandom": {
+					var mo = cast(object, MeshObject);
+					if (mo.particleOwner != null && mo.particleOwner.particleSystems != null) {
+						f = mo.particleOwner.particleSystems[mo.particleIndex].getSizeRandom();
+					}
+				}
+				case "_particleRandom": {
+					var mo = cast(object, MeshObject);
+					if (mo.particleOwner != null && mo.particleOwner.particleSystems != null) {
+						f = mo.particleOwner.particleSystems[mo.particleIndex].getRandom();
+					}
+				}
+				case "_particleSize": {
+					var mo = cast(object, MeshObject);
+					if (mo.particleOwner != null && mo.particleOwner.particleSystems != null) {
+						f = mo.particleOwner.particleSystems[mo.particleIndex].getSize();
+					}
+				}
+				#end
 			}
 
 			if (f == null && externalFloatLinks != null) {