just a quick (maybe weird) question: I want an invisible mesh to cast a shadow and cant get it to work. As soon as I set visibility on the mesh or alpha on the material to something else than 1, I don't get a shadow anymore. Am I doing something wrong or is this maybe intended like that? What could be a work around to get my shadow without the user seeing the mesh.
Playground example here: http://playground.babylonjs.com/#I2H3M