I get a "Parameter unknown material" error when I try to run the level in reference to the "nogouraud.wdl" file I created to include the material action:
action MyFlatEntity
{
wait(1); // just to be safe
material= mat_flat;
}

I added the .wdl to the main level .wdl file, and added it as an action to the models I want to use it on. Any suggestions on what I might be doing wrong? Thanks...