S!
What do you mean by rainbow textures? In CoD or other games too? Epilepsy filter is the only one I know of that can cause that in CoD. I have no problems whatsoever with these betas and 12.6 CAP1
I post my CCC settings below if that is of any help.
Antialiasing set to Application Controlled, mode Standard and Morphological is Off.
Anisotropic filtering at Application controlled.
Tessellation AMD Optimized.
Catalyst AI set to Performance and Surface Opt Off.
Vertical refresh on Off, Unless application specifies.
Antialiasing mode set on Performance.
Triple Buffer Off.