Direct Rendering to Stage

[BitsNinja]

I'd like to mess around with 3D graphics, but it still be performant. I'd like to find some way to render directly to the stage, I've been digging through the source, but I can't seem to find what I need. I know I can use JS extensions, and I've managed to get as far as drawing on the WorldMorph, but I cannot seem to figure out how to render to the StageMorph, or if that's even what I need to do.

Something that did pique my interest was someone's GL renderer library that they added here in issues, but that doesn't seem to work anymore, since it's been 6 years since that was released. Any direction would be enormously helpful.