As the title says, I’m getting some strange…shadows…or something when using multiple spot lights in a scene. The room I’m trying to recreate has 4 lights on all 4 sides of the room so I wanted to setup a similar scene in blender. Originally I did this just with an emission shader applied to a face inset on a cylinder to simulate a track light, but I couldn’t get that “spot light effect” (can’t think of the correct term atm) on some spots on the wall, so I added the spot lights into the cylinders, which is when the problem started. Then I removed the cylinders to see if it was some interaction with them, which it wasn’t.
This is a test I did to replicate the problem. Some of it was exaggerated to show the problem a little better. It almost looks as if a noise texture is applied to the walls, or the lights. In testing I increased the size of the spot shape, and that seemed to get rid of the problem, but it also got rid of the spot light effect on the wall that I want in some places.
Wondering if it is because I’m using multiple spot lights. I want the control that comes with spot lights, and as mentioned above the ability to control the “spot effect” on the wall. Oh I’ve tried turning denoising off and that doesn’t seem to make mych difference. I also tried it with area and point lights, which got rid of the problem, but then the “spot effect” goes away.
I did try increasing the samples, and that seems to help, but of course it adds to render time. Maybe I just have to live with that though. Maybe there is something else I’m missing that is causing this to happen?