Reply To: How do I get an uneven edge to the yellow paint on the columns and wall. I want to fade it or roughen it somehow. Having the yellow end at the exact same line everywhere looks too artificial to me.

[spikeyxxx]

There are several ways to do this.

You can insert a Noise Texture and a Color MixRGB between the Mapping and Gradient Texture Node:

This is a common technique that is used the most, I think.

If you want to fade the transition, then change the interpolation mode from the Colorramp.