I'm pretty sure FPSC still needs the object to be dynamic to have multiple textures. I also use DDS or TGA images, but PNG might also work. Do you know how to make a model FPSC ready? if not check out my tutorial on making models with sketchup. I know you said MAX but once the model is an X model the process is the same. Tutorial is here about halfway down:
http://forum.thegamecreators.com/?m=forum_view&t=177710&b=21
It is very important to make sure the object is dynamic and the texture line in the created fpe file is empty and all textures are in the same folder as the model!
If I could make 2 suggestions:
1. Do not make the floors in MAX, use FPSC segments. How I do this is if I have 2 buildings I make them 100" apart in my modeling software. That way a standard FPSC floor segment fits right between them. FPSC enemy characters have trouble with collision detection on entities.
2. Plan your scale, plan your scale, plan your scale! A little graph paper goes a long way. I use a free drafting program called DRAFTSIGHT to lay mine out with the snap settings set at 100" x 100", but pen and paper still works fine (I would use 1/4" graph paper and draw at 1 square = 100" This way is coordinates with FPSC's full scale.
Keep posting here if it gives you trouble and we'll get you rolling.
