Mask by Colour with Nodes

Question

Is it possible to mask by colour with nodes? Say for instance I use the colour output of a procedural noise. How could I extract the "red" noise from the RGB noise as a greyscale isolated map? So that I could further use that as a multiply/subtract noise mask.

In Terragen we have nodes such as Red to Scalar, Green to Scalar, and Blue to Scalar, but I can't find a similar node in Blender.

Update: I am leaving this question up, and not deleting it because of its relevance to another topic, because it is not relevant by title in that people may not even know what a "RGB Map" is. There is a reason I didn't find it, or the related questions didn't bring it up initially.

Further reading: Using an RGB map to assign various shaders in a material

score 5 · Accepted Answer · answered Sep 26 '21 at 18:05

5

you can use the separate RGB node like this:

answered Sep 26 '21 at 18:05

Chris

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Oh thank you. Probably should have searched more within Blender than relying on Google. OT: Boy, do a lot of irrelevant tutorials pop up filling search results. – WASasquatch Sep 26 '21 at 18:18
you are welcome – Chris Sep 26 '21 at 18:24

Mask by Colour with Nodes

1 Answers1