Print lithophanes on their backs. Lithophanes are not like other 3D prints, and in terms of how they work they're much more complicated. It layers CMYK filament colors to various thicknesses and which act as light filters. If you try to scale a lithophane, a lot of the time it messes with the ratios of the colors. For example, one part of the lithophane might have a layer of yellow that is .16mm thick. If you were using a .16 layer height, that is 1 layer. If you lowered the Z height down to 50%, that would be okay as long as you changed the layer height to .08 since that layer of yellow would still be 1 layer thick. But i you scale the lithophane down to where the layer of yellow is less than the set layer height, it will just not print that part. So say you scale it down and the yellow part is .07mm thick and the layer height is .08 mm thick, it won't print that. Point being, you can't just throw a lithophane that someone created for a .2 layer thickness into some other print settings the same way you could with regular models. Another factor is that to produce some colors, you NEED a minimum thickness of various color combinations. It just how the properties of light are. A good example is water. If you want water to look blue like the ocean, there has to be deep enough. https://lithophanemaker.com/Color%20Lithophane.html https://www.youtube.com/watch?v=krmFPMbnMEg Use that website and watch that video. If you want to make a lithophane that has a LED backlight, just use the settings that guy uses. If you want to make a lithophane that displays using only sunlight, which was my goal, then you might need to play around with the settings on the lithophane maker site.