Cylindrical lithopane

thingiverse

This tool uses a surface height map from an image to render it on a cylinder's inside surface, which are also known as "litho phanes." However, an updated version allows for embossing the outside of the cylinder instead. Note that outside embossing appears sharper when lit from behind but may result in a non-smooth exterior when unlit. To customize your design, scroll down in the Customizer to see all parameters; however, be aware that the preview might be slow. It's recommended to print with an excessive number of perimeters or at 100% infill for best results. For optimal quality, use a high-contrast image with a plain background, and preprocess it to be 81x61 pixels and monochrome if necessary. If your background is light, select the corresponding option in the settings for better blending.