Export an ASE-Model with 3ds Max

1. Create a simple box.

   

2. Open the "Material Editor".

   

   Choose an empty material slot. Rename it to your desired texture e.g. "textures/base_wall/metalfloor_wall_14".
   Drag the material onto the box, and turn on "Show Map in Viewport".
   Load a checker map into the Diffuse channel (this step is just for view purpose in 3dmax).

   Note: You could also use a bitmap "textures/base_wall/metalfloor_wall_14".

   

3. Add a UVW map, change it to box mapping, and tiling 5x5.

   

4. Click menu File -> Export.
   Choose ase format and save it into the models folder. (it won't load otherwise in radiant if you try from somewhere else)
   Use the settings in the screenshot.

   

You're done.