Objects not receiving shadows

I am new to Babylon and 3D so forgive the triviality of my question. I am putting together a scene and require shadows to be cast and received by most of my objects. For the prototype scene I created I cannot get the planes/box in my scene to receive shadows. They cast them just fine, but will not receive the shadows cast by the other objects in the scene. I created a playground showing my problem. Thanks!

Hey and welcome!

The color are not between 0 and 255 but between 0 and 1 :slight_smile:

https://www.babylonjs-playground.com/index.html#HFA46L#3