I'm trying to get my head around the functionality that allows lights to only illuminate certain meshes - namely using  includedOnlyMeshes and excludedMeshes .   And I seem to have run into a problem which hopefully you can see with this playground example   Lights   The example has two spheres, sphere(centre screen) and sphere2 (right side). Down the script four lights are set up and there are some marked lines of code for "turning off" the red and green lights for the centre sphere.   The red