Right now, we're kind of shoehorning our features into the default max material/map sets, and things can get convoluted. It's not really all that difficult to use, but it's mostly just a process of remembering which checkbox was for our clipmapping vs. what 3ds max has named the checkboxes.
Brian Tate posted something on the Discreet board a long time ago (Feb 2000) when he was working through this, and it seemed from the replies that material support was pretty buggy.
I can post the thread if anyone's interested (I saved the html back then, in case it might come in handy). Larry Minton and Borislav Petrov had some interesting suggestions. All of it might be max3-specific though.
Anyhow, just wondering if anyone's created a material like this lately.