Is it possible to control garagecube's LED kit in Millumin?
Unfortunately, I only have Anyma's udmx and it is not supported in Madmapper, but with Millumin.
If this works, does anyone possibly have the fixture files?
Since the LED are either RGB or monochromatic, you can use a DMX layer in Millumin to control them (you do not need to instal fixture files). See this tutorial.