Swapping texture on certain polys

Blitz3D Forums/Blitz3D Beginners Area/Swapping texture on certain polys

I still don't seem to be able to do this. I tried detaching each tile as a seperate object, but this causes problems for my lighting (I have a lightmap shadow cast over the grid).

Is there anywhere that I can find more information on surfaces in Blitz, or is there another way to change the texture on certain triangles only?