I am currently printing a flat item using AMS with the final couple of layers having a multicolor pattern on them.
This prints fine.
However I would like to print it upside down so that the pattern is on the PEI bed and gets the texturing. In the preparation all looks good but when I slice the pattern disappears.
The pattern might not actually be flat, after you flip the model try using split to objects and the parts should fall flat to the build plate, then use assemble to put the model back together, then slice and see if that helps. I created a video on doing this with Text. Link: https://www.youtube.com/watch?v=21ULxfe6XkI