The problem with lights in my clock model is that they rotate after modification of openings. I forgot the rule:
(...) if a light source intersects with a rotated part, it sounds logical to make it rotate too.
(#39691 )Pity - I created new model and it looks good with lights on but only if openings are in their initial position (time 00:00).
There's no space inside where I could place light not intersecting with openings.
I don't know how to define part of model as a triangle mesh light (opaque panel).
I haven't found any clever utilization of "arm_on_ball" yet
