https://plotter.vision converts 3D STL files to 2D SVG suitable for #plottertoots with interactive camera positioning, back-face culling, hidden-line removal, and coplanar-triangle merging.
@th That's neat. With colored face rendering and removal of lines on smooth surfaces (where they are not between a front- and a backface), this could give great renderings for Lego MPD files in a way that doesn't look like (because it is) rendered and edge-detected.