Laggy

Ducon, This is a fantastic image, as it highlights what I've been trying to recreate in MAME/Retroarch. The shadow mask is clearly visible in these images, but I can't recreate those in MAME or retroarch, at least on my 4k screen. I call out that last point, because I have a suspicion that the resolution is drowning out the shadowmask. Or it could be some blurring or blooming on the shader, though, that doesn't happen with real CRTs, from what I've seen. Are you familiar with any documentation on using the shadow mask images? I'm using BGFX, and it appears that the shadow-mask image configured in mame.ini is ignored (a 48x48 pixel mask) as it ultimately uses a custom one that is 1/4 - 1/2 the size. EDIT: I think I discovered the issue, which appears to be in the shader set I'm using. Ultimately, it's taking a single shadow mask png and stretching it across the screen in a mostly transparent smear that is hard to see except when the screen is dark. Now, to see if I can trace down where it's going wrong in the chain. EDIT2: I was able to get the shadow mask applied correctly, so it shows up within the scanlines...but, it's still a far cry from sharp, like your image. Perhaps it's getting blurred, or bloomed out of existence. Will keep testing. EDIT3: Discovered the Aperture Strength setting, and it is definitely conflicting with some other settings...switching to pure crt-geom, and it looks cleaner, but lacks some of the modifications of the chain I'm currently using. Still, getting a better handle on this.