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View Full Version : Multiple bump maps on a Vray Material?

Richard7666
03-01-2012, 07:33 AM
I'm trying to texture a brick wall, and need Bump A on the cracks, and Bump B on the rest of the bricks.

Basically, is there something I can plug both texture file nodes into, which has a slot that I can use to plug in a file to use as a mask? ie, black on the mask means Bump File A will take precedence in this area, and white means Bump File B will take precedence. Tried using a Blend Colour utility node for this but things got messy when I plugged it into the bump slot of my Vray Material.

That's just my idea, anyone with a better one I'd appreciate it!
djx
03-01-2012, 10:37 AM
The blendColor node should work for mixing two maps, and for more, the layeredTexture node works well in vray. What did you mean by "messy"?

David
divanovic
03-02-2012, 11:21 PM
hi,
you can try layered texture node, on which you can plug in 2 or more maps. Each slot has its alpha channel which you can use as a mask. On top of that, there is a blending mode so you can set how your maps mix (e.g. multiply, add, etc..)

a bit more practical approach, imho, would be a vray blend material. So you can have independent controls on both materials, in terms of color, spec, refl and so on. No need to layer texture every channel as in the first example. Mask is used to set how the materials mix.

hope it helps,
cheers
Richard7666
05-14-2012, 10:27 AM
Coming back to this with a slightly different angle, I want to do the same thing but with displacement in Vray. Trying to blend two maps using a third, to eliminate the appearance of tiling in displacement mapped grass.

- I plugged a Layered Texture into the 'file' slot of a Displacement node, and plugged the Displacement node into the shader's displacement slot.
- Layered Tex consisted of two maps (Tex A and Tex B), and another map plugged into the 'Alpha' to control the blending (Tex C). Played with the options to get a nice blend.
- Then I planned to simply connect Tex C to a different UV map via the Relationship Editor. However, the Relationship Editor seems not to recognise any of the textures I have in the Shader's 'displacement map' slot, only those of the material in the 'Material mat' slot.

http://iforce.co.nz/i/3urnndhm.v5j.jpg (http://www.iforce.co.nz/View.aspx?i=3urnndhm.v5j.jpg)


Any suggestions?
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