XSI Exporter - Bump mapping and multiple uv coords

Priate_Tobey · Post by **Priate_Tobey** » Wed Mar 15, 2006 10:50 pm

Me again

I am exporting an object out of XSI and experience some strange results.
If the model has only one uv coord set, everything is fine.

But with two, the result is weird, altough the second uv is not used in the shader (it just is in xsi, and therefore in the vertex data, I assume)
I guess it has something to do with the tangents..?!

1 UV coordinate set

2 UV coordinate sets

Another question, switching on and off tangent export in the XSI Exporter has no effect on the result. Is it possible, that they have tangents anyway?

Thanks again

Post by **sinbad** » Thu Mar 16, 2006 12:11 am

Are you using the example bump mapping shader? The shader is specifically written for the UV layout of the media it's designed for, varying the UV sets will throw out the shader bindings. You'd have to change the shader to pick up the right components from the right place.

Priate_Tobey · Post by **Priate_Tobey** » Thu Mar 16, 2006 12:54 am

Yes, I did. I missed, that I have to adapt the TEXCOOORDs in the shader. I somehow confused it with the texcoord_set in the shader...
Now it works