When using the colour parameters "Blue_3" and "Green_3", the unit didn't seem dim these colour values when the intensity was set to a level Less than full, however "Red_3" did dim. When I edited the fixture profile to use all 3 colour types as parameters "Red", "Green" and "Blue", the problem went away. Another thing I noticed though was the Green and Blue parameters where on the other side of Hue and Saturation, almost as if they were not included in the group of colours? (on ML Controls).
Also, when I used a pixel map on these fixtures, it would only apply the colour data to the first RGB parameters. It would make sense to me to extend the fixture across 3 cells making cell 1 control RGB 1, cell 2 controls RGB 2, and cell 3 controls RGB 3. I managed to work around this by changing the pixel map patch too each RGB as a different fixture, but I'm sure I read somewhere that eventually pixel mapping will reference the channels in the patch. If that's the case, then I feel this would become an issue.
The units we are using are American DJ Mega Bars (which I had to build my own personality for).