Hi!
I found small bug in serializer.
It crash, if i try serialize scene with ShaderMaterial's.
Uncaught TypeError: Cannot read property 'asArray' of undefined
serializeMaterial @ babylon.max.js:24503
SceneSerializer.Serialize @ babylon.max.js:25000
ambientColor and etc property's is not present in ShaderMaterial's. I think we need one 'if' there, who exclude all shaderMaterials from srialize process.