Recent content by tricia0802

There is a really cool effect that happens when you use a donut gel with a gobo. If the hole is the proper size, then the negative space of the gobo becomes the color of the gel. For example, if you have an R89 gel with a donut hole filled with R59, the light of the gobo beam will be colored...

I am going to be using a lot of donut cut gels in my next show, and I know that there is supposed to be some kind of math behind the size of the hole. Does anyone have any insight as to what that math is?