Hi, This is a naive question because I didn't try so far to code any shader, but I read the docs, in particular the one about the ShaderMaterial : https://www.eternalcoding.com/?p=113 Well, I'm wondering if there's  a way to define a custom vertex shader and still use, say, the BJS StandardMaterial. Something like :  var mesh = BABYLON.Mesh.CreateXXX(); mesh.material = new BABYLON.StandardMaterial('sm', scene); (???) => mesh.vertexShader = new BABYLON.VertexShader("vs", s