Really nice work guys, it works like a charm. I just have a question, i still don’t get quite right how u manage to calculate the proper “custom_viewport height and with” and the “x and y position”.

I read all the post on the forum about this for other overlays for other emulators like snes etc., which works well too. But i don’t get how u figure the proper numbers including your “gameboy painting around the gaming area” or not including it for example.

Natively, if i got it right, the GameBoy has a 160×144 resolution, so what have been ur process to end with a

custom_viewport_width = "358"
custom_viewport_height = "323"
custom_viewport_x = "248"
custom_viewport_y = "79"

If u could explain it to me again because i read things about this already but it’s not cristal clear and i would like to try to create some customized overlays myself ! I would be grateful for your help !

See u soon on the forum :p