[Ben Krasnow] of the Applied Science channel recently released a video demonstrating his process for getting copper-plated traces reliably embedded into sintered nylon powder (SLS) 3D printed parts, and shows off a variety of small test boards with traces for functional circuits embedded directly into them.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/06/20/watch-sls-3d-printed-parts-become-printed-circuits/