As a cultivator I spent most of my time contemplating how to get my cultures to fruit. Sometimes it was a simple ´signal´like a change of ph, temperature, humidity, or introduction to a suitable bacterial culture. Sometimes it was dang near impossible. Sometimes it seemed like it might take a little soft lights and wine. . .
The false leather guys are creating an artefact from raw material: the mycelial ´mat´ made up of hyphae. They slaughter ´em. They don´t stand up to ´plasticising´ by solvents like ethylene glycol. Dead is dead. (Although there might be zombies. . .)
Bob