Since Peter Parnes   posted his lithophane,

3D Printing
,
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Since @Peter_Parnes posted his lithophane, I couldn’t resist this picture of one of mine which shows the same piece front lit (left) and backlit (right). Printed on a +printrbot Plus (v1) in ABS

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What layer height did you use for this?

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Almost (but not quite) 200 micron. Whatever it works out for an even turn of my ACME rods (like .197 or something).