I am new here, this is my first question.
I like to project with 1 beamer on several display surfaces(4-7) for my shows. Normally I have one layer covering all surfaces together. what I would like to do is “black out” the areas where no screen is positioned.
Also a similar question arises when I want to project on an elliptical shape or a triangle.
Any ideas? I could not find an answer by myself for the problem below, if one exists id be thankful for any pointer in the right direction…