I'm new to blender, and I'm a hard time understanding layers and collections. I started using Blender on 2.8, and most of the topics I read about the matter compare how it works now with how it used to work. I know I can do this by using layers and collections but I would really appreciate a step by step guide.
There is a background, a shirt, and a backlight between them, to light the shirt. I want this area light to affect only the shirt, and not the background. But I do want the background to be affected by everything else (shadows, other lamps and such). How should I proceed?
Thank you very much!