So Hugo just emailed me back and basically said the layers only matter if there’s an issue with the file. The printer automatically prints RDG_White first, then all other colors, then RDG_Gloss. He said the color separation needs to be done though (no overlapping colors). So I guess the next thing to determine is how to remove all overlapping colors!
Here’s the message from Hugo:
“Unless customer specifically send a request, always first white print and then color and then finally gloss print is done.
Layering is important only if we have to open your file and check something but if your file is perfect and we don't need to open it
then layering is not that important, machine will look for rdg_white areas in file and print it and immediately after it will print any other color,
and then machine will look rdg_gloss paint and finally apply it.
You can overlap things on white layer, for example, you have red cat and enclosure is black, red cat with disappear without white background,
so you create white copy of that cat first and paint with rdg_white, this kind of overlapping is allowed and it is necessary.
But for example you have red cat and on blue carpet, you need to use software ability to remove blue carpet from the areas where red cat is overlapping. Overlapping different colors is not good practice for uv printing ( except overlapping on white )
If you do these all fine, then layering is not big issue because we don't need to open the file and inspect data.”