This set of 6 tiles is names "self-constructor" because each tile can be formed by joining a subset of 4 (smaller) base tiles.
Mold design (lets just pretend our environment lacks one "amino acids" because I forgot to include one tile)
SLA print on Form 4
Smooth-On OOMOO™ 2 part silicone mold
Mysterious cast generously poured by Jiaming leads to tiles
self-constructed tile