+ if(MaskMatch(materialDef.mFlags, MaterialDefinition::OCCLUSION))
+ {
+ shaderDef.mDefines.push_back("OCCLUSION");
+ }
+
+ if(MaskMatch(materialDef.mFlags, MaterialDefinition::EMISSIVE))
+ {
+ shaderDef.mDefines.push_back("EMISSIVE");
+ }
+
+ if(MaskMatch(materialDef.mFlags, MaterialDefinition::GLTF_CHANNELS))