noneuclideandreamer, German Genuary Prompt 29: Signed distance Function
Also: Monthly High-Resolution Render for Patrons of Level Square and up (25600x14400)
Octrose Pattern achieved by the Cut-and-Project Method:
An 8-D Lattice cut by a skew plane lying through it a 2-face gets projected onto the plane iff its dual 6-face intersects the plane. To check this I take all the 5-faces bounding the 6-face and check their signed distance to the plane.