Thank you labithiotis,
I want to use a black and white texture to determine where 2 textures are mapped.
I want to do this at runtime, I am making a dynamic texture template like the ones in Genetica and AutoCad. The result will be a terrain texture tileset
The texture I can produce is like this :
<img src="https://dl.dropbox.com/u/1660874/texture%20dump/pngbump.png" border="0" />
The result of mixing the 2 textures would be something like this:
<img src="https://dl.dropbox.com/u/1660874/texture%20dump/awesome.png" border="0" />
I appreciate this very much <img src="smileys/smiley1.gif" border="0" align="middle" />