There is a problem with the screen flickering. The property of roughness

[devoytinc]

Godot Version

Godot 3.5.3

Question

I would like to know the cause of the problem or solution. when I move around the stage or point at a certain point, my screen becomes like thisю.
When I remove the connection with the roughness property, everything becomes fine.

This shader is the basis for a shader with which you can remove dirt (perlin noise) from 3d objects.

I used a translator. I hope he translated everything correctly

[Efi]

Add a scalar Clamp before the roughness, maybe (??)

[devoytinc]

It works! Thanks