isolating a bump layer

[Dreamer]

I am trying to separate nodal textures with no luck. The attached picture shows a tile floor with a reddish brown overlay. How can I get the overlay to have the bump, but not the tile?

[toby]

You should have the tile texture as the background instead of the foreground, that might do it.

[Dreamer]

That doesn't do it, I tried and it looks like this.

[JeffrySG]

Have you tried to just build your bump and color separately? And just run your bump into the bump input and the color into the color. If there is a way to combine them after you get it working you could try to do that but it might be easier to set up as separate node trees until you get it working.

[jameswillmott]

You want the bump to only appear on the overlay right? You need to take the Alpha output of the overlay ( the Crumple texture ), and feed that into the bump amplitude input of the fBM noise node.

Crumple.Alpha -> BumpAmplitude.fBM Noise
fBM Noise.Alpha -> none

EDIT: Actually, what you've got is a bit more complicated, I've attached a simplified graph for you to see what I'd do.

[Dreamer]

Jeffery and James.
Thanks for the help. This is what I was after. I knew the mixer was needed, but uncertain as to where to place it.

Nodes are still a bit confusing, but I see some progress.