I'll try to clarify. I have a guitar body mesh.
I want the front & back to have a lighter wood texture.
I want the sides to have the same texture, but stained darker.
Here's the tricky part: the darkened wood texture should extend a short distance 'beyond' the sides, and into the front and back of the guitar. Here's a pic of what I mean:
Is there a node setup that lets me do this without texture painting?
I tried pointiness but it doesn't work, maybe because my mesh is a mess, or the edges are too rounded.
Here's where I'm at so far - I can target the sides by using a geometry node. Sort of like saying "apply the texture to faces parallel to the local Z axis". But you can see the issue - the green color doesn't bleed into the front and back, it strictly covers the side. The color ramp doesn't help. Is there some way to extend the green area a few inches onto the front+back faces?