[3dsMax] Flatten Mapping... is disabled

For some reason the “Flatten Mapping…” in “Unwrap UVW” modifier, under “Mapping” pull down is disabled when I try to get the best mapping of the model and sve its layout for texturing.

Any idea why?

Also, is there a function similar to “Add Seam” in 3ds max like in Blender to cut up the model for better mapping?

I suggest that you start asking such questions in area.autodesk.com. That’s where the Max forums are. :yes:

Yes, and read your documentation…