Anyone know much about multi texturing/blending? is it tough? any articles on it? anyone given it any thought for 3d iso maps? Lep

Its wonderfully easy..... to an extent (isn''t that always the way?). Basically, you setup additional texture stages and operations - and it works. A good way to learn is to write a simple app that draws a big square onscreen with a texture and a lightmap.

Things get complicated when you need more than one set of texture coordinates (in other words if you have a lightmap that covers several tiles - which really is the best way to do it, given texture memory restrictions). You end up having to construct a customized vertex format and use the Flexible Vertex Format flags... its not very hard to figure out from the SDK docs, but I can''t think of a good article about it off the top of my head.