The CRT filter is not enabled by default; this is a custom setting. Try setting "Scaler" to "<default>" in the Global Options menu. Okay, this is weird... I changed those settings to default multiple times last night with no success. I went in today, changed it again, and PIXEL ...

I recently reinstalled ScummVM after a few years to replay several titles, and I noticed that all of the games display with some sort of filter/shader by default now -- it sort of looks like it's a faux cathode ray mesh (?) overlay? I assumed I could disable/change it, but turning off filtering does...