which filter is best to remove the verticle line artifact?
 

JoeJ said:
After that i would try to calculate the noise on demand and per pixel in the final FS, instead fetching it.

Thanks so much! as the noise generation cost much, so need to gen it in a low resolution fbo. and also sample the noise textuer 3 times to make a normalized vector to pass to next pa…

AliAbdulKareem said:
What I don't get about it, is why does it only happen on diagonal edges or so it seems?

If the edge is aligned to the grid axis, either X or Y remain constant. So if we sample along the edge we stay always at the same ‘error’. We're still on a hyperbola as you've figured out, but…