Hi Greg,
Java Virtual Machine has a setting for amount of memory and naturally you can change it. In processing environment there is a text file for loads of settings that are not available from PDE. I think you can set JVM memory size larger than amount of physical memory, but then system will swap memory and everything slows down.
I’m quite positive that browser has similar setting for javascript environment
Well it is a lot. You can make a three meter wide print with excellent quality or six meter wide with good enough quality. With multiple displays or projectors that’s enough for 6-8 8K displays and I don’t think you attach any more displays to a single computer.
I’m curious @grege2 when do you need even larger canvases?