Thanks. I’ll try that. I think I did, but the colored glass didn’t seem to affect the light. How transparent should I make the glass?
For the other problem, I created a spotlight. Made it volumetric and added dust. When I render, I see the light beam coming to the floor with dust. I wanted three, so I just copied that light and pasted twice. The volumetric and dust do not show up on the pasted lights, even tho’ they show in the parameters.