I'm trying to 3D print a die for use in a game designed by my grandson.
Each face has a symbol engraved on it.
The vertical faces print well, but the top and bottom don't. The engravings are filled in and barely visible. From looking at the top and bottom layers in Cura, this appears to be happening during slicing.
.jpg -> Inkscape - trace path, save as .svg -> Tinkercad - import .svg (scaling 5%), add to die as a hole, export .stl -> Cura
Using Cura 3.6, Ender 3 'Normal' profile except
Fill gaps between walls - nowhere (thought this might be the problem)
Infill 10% Gyroid ('cos it looks fun!')
Initial Layer 20mm/s
Combing Not in Skin
Two guesses as to source of issue
1. There is a Cura setting that I need to change to keep the engraving unfilled - if so where?
2. The engraving lines are just too fine for Cura to cope. If so, why are the vertical sides fine?
Any suggestions gratefully received.