Tried to create minimal example, shadow generated looks wrong, also if you rotate it around you can see weirdness in the shadow
http://www.babylonjs-playground.com/#MKF8U
Also, the position where the spot is illuminating is very close to the camera position, I think the shadow should be cast behind the object but looks like is being cast in front of it?
Tried also similar scene when the light is not parented by the camera and also got some shadow weird artifacts, doesn't look like the parent relationship has to do with the weirdness
Any idea how to get the shadow properly?