I made this using Voronoi Texture node with Color Ramp connecting it to Color and Bump. I would like to add noise only to the flat areas. Any method?
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1$\begingroup$ I guess in the flat areas the color output of the color ramp is black. So what you could do is use a Math node set to Greater Than with Threshold 0 and use this as mix factor for a Mix RGB node. In Color1 plug the Noise Texture, in Color2 the color ramp output you use for the bump. Maybe you have to multiply the Noise Texture with a very small value or use a Map Range node, since otherwise the noise bumps will be as high as the voronoi bumps. $\endgroup$– Gordon BrinkmannCommented Aug 26, 2022 at 12:51
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2 Answers
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you can use this node tree:
by changing the "greater than" you can choose the right factor.
I just mixed the color of the noise here - you can of course do whatever you want with it.
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What you could do is use a Math node set to Greater Than with Threshold 0 and use this as mix factor for a Mix RGB node. In Color1 plug the Noise Texture, in Color2 the color ramp output you use for the bump. Maybe you have to multiply the Noise Texture with a very small value or use a Map Range node, since otherwise the noise bumps will be as high as the voronoi bumps. (This might not be too bad with Bump, but for better visual display I used Displacement as well and there it might be problematic.)
answered Aug 26, 2022 at 13:12
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1$\begingroup$ @ArunNura If Chris' or my answer helped you, you might consider accepting one of them: What should I do when someone answers my question? $\endgroup$ Commented Aug 31, 2022 at 9:54