This is to go with my 6-color painted Great Wave off Kanagawa model (link below). No backing for this one, to be used to fit a tan background or a HueForge panel of the tan background to fit closer to the original painting. No LEDs for this frame. I have another frame that I made larger to LED installation, I will post it soon.
I recommend using the smooth PEI plate with brim, then use the bottom side for facing the front. Otherwise, you can try using ironing for the smooth front-facing part.
Use 10% gyroid infill. You can use any layer height you want, but I recommend 0.28 less.
https://makerworld.com/en/models/61819#profileId-64251