I agree. Most of those types prints I have done have not turned out very well. Yours looks better than average. As counter-intuitive as this sounds, a higher infill might help give you better detail with some decrease in light.

I was thinking maybe another perimeter to add depth might help, but don't use any infill on the walls because it will obscure the picture.

I am playing around trying to get the best settings because I have about 5 months until a friend of mine gets married and she wants them as center pieces. I don't want to wait til the last minute to start.

I have a Makerbot replicator 2x
the nozzle diameter is .4mm
and i am using natural ABS

Here are my settings

printer settings
.1 mm layer thickness
2 shells
10 % infill

Can I make the walls thinner and print with 1 shell so the pictures show up better
or would it collapse.
I am going to use this as a tealight shade.