Thanks, glad you like it
It’s unlikely that the BezelProject has anything to do with it. One thing to check is that you don’t have a per game or content directory presets saved, as these will override the core preset.
What version of Retroarch and which version of the shader are you using?
Can you load the standard guest venom shader then change some settings then save a core preset, then reload retroarch and see if this has been applied correctly?
To test you could increase the curvature a lot, that is an easy one to use to test.
btw, what is the mega bezel preset you use the most?