Crt_geom_flat and 1:1 P.A.R. [Green Tint]

I’ve been noticing that when I’m using crt_geom_flat.cg and choose a 1:1 pixel aspect ratio, there seems to be a green tint to the image. It disappears when I go back to ‘core provided’ aspect ratio… It’s very noticeable in the beginning of NeoGeo games with the white background. However, the crt_geom_flat-sharpness variant doesn’t behave this way… I’m trying to compare the 2 shaders to see whats different and see if I can fix the problem (if it is a problem;maybe it’s supposed to look this way?), but I could use some help.

Is there something I can comment out that’ll fix this for me?

Thanks!

EDIT

Actually I figured it out… I disabled 'DOT MASK EMULATION" and the problem went away. I guess it has issues with certain resolutions…