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View Full Version : How would I setup multiple normal maps on a model?

nilslerin
08-22-2007, 02:35 PM
Hi!

So I'm trying to setup a face with wrinkle maps (one could argue this should be posted in the character setup section but it's more of a shader question I think).

We have base normal maps for our characters so the wrinkle maps has to be added upon the base map. So I've created the base normal map with the transfer map command using a lowres and highres mesh and so far so good. Then I've created a wrinklemap (normalmap) for the wrinkles above the eyebrow and I want that to be added when the character raises his eyebrow.

Is there some kind of shader network that allows for multiple normal maps or perhaps a shader?
hakanpersson
08-22-2007, 04:44 PM
Blending bumpmaps rather than normalmaps is of course much easier, and should be able to achieve in a layer texture node without much of a trouble. The blendmode for a normalmap however is more difficult, and I doubt the toolbox in maya got what you need, but that is just me guessing.

Perhaps you should look into highend3d.com in their shader section.
nilslerin
08-22-2007, 05:51 PM
Well there are a number of ways to blend bump-maps but I really need to use normal-maps.

There is a mel-script on highend3d (http://www.highend3d.com/maya/downloads/shaders/SmarNormal-4775.html) that is supposed to create a shader network in which you can plug in multiple normal-maps but I can't get it to work.

If there is a HLSL shader for this it would solve everything.

HLSL shader writers can take a look here (http://delivery.acm.org/10.1145/1290000/1281667/p33-oat.pdf?key1=1281667&key2=2038177811&coll=portal&dl=ACM&CFID=15151515&CFTOKEN=6184618)to see how multiple normal maps can be blended

/Nils
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