(2021-08-03, 21:55)Roland Melkert Wrote: They where used to mix colors by alternating 2 colors from a 16 item palette close together making them appear as different (custom) colors from a distance. I think it had to do with the CGA/EGA monitors of the time. LDCad fakes them by calculating the (a+b)/2 RGB values.
You can disable them in the prefs/ldraw menu without editing the configuration.
If a model uses one of those colors it will automatically be added to the color bin during that LDCad's run.
All official parts that used dithered colours have been reworked, and there should be none left in the library.