also have a look at PGraphics framebuffer can be rendered in `noLoop` mode but cannot be rendered in `loop` mode
as if i can find a way to grab the PGraphics framebuffer data as quickly as possible with as little performance impact as possible then i could in theory just directly render the framebuffer directly to g (sketch PGraphics) and then figure out a way to set up and switch to multiple framebuffers without needing to call endDraw(); as a way of quick switching the PGraphic framebuffer associated with the main PGraphics FBO stack
eg
switchFramebuffer(g2);
g2.draw();
g2.render();
switchFramebuffer(g3);
g3.draw();
g3.render();