Answered: Not all Material IDs are selectable?

Rekov

I tried to use colors that were as different from each other as possible to avoid confusion, so I have black, white, red, green, blue, cyan, magenta, and yellow, however I cannot seem to select cyan or magenta to assign a material to them. Am I doing something wrong here?

Synaesthesia

Those regions were culled from your IDs in the *_ID.PSD loaded in Photoshop due to being too small in pixel density. DDO assumed they were noise and removed them. In order to use those colors as a mask, you'll need to reimport the project after painting 20 to 50 pixels worth of those colors in the UV gutters to bypass the noise filter.

Alternatively, you can take those colors and turn them into a standard mask. Page 16 of my DDO tutorial should clarify: https://www.artstation.com/artwork/oBWR4

Rekov

Thanks!