https://plotter.vision now has anaglyph support for turning your 3D shapes into 2D drawings that can be plotted with colored pens and viewed with red/blue glasses for a 3D effect.
https://plotter.vision/ has improved rendering speed thanks to avoiding recursive triangle occlusion and memory allocation.
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.
The first image received from Mars: an interplanetary color by numbers (JPL, 1965) http://www.directedplay.com/first-tv-image-of-mars
A simple method for sending pictures by wire or radio (1936) https://archive.org/details/electronictelevi00eckhrich/page/48/mode/2up