How to fix Parallax Occlusion Mapping decal with blurry angle

Hello,

I made a parallax occlusion mapped decal that has opacity mask and it looks great when looked at straight or at a slight angle but a sharper angle results in blurryness.

It’s the usual parallax occlusion mapped material except I changed the POM function to work on walls, like in PrismaticaDev’s video (watch?v=NOifAPle9zo).

Anyone have a solution?