Before doing anything else, I had to make sure I could get the felt realistic. Am I allowed to plug addons from blender market? I’m using simple scatter by Troy Bowen. Worth buying ($10) and definitely watch the video a couple times.
Right now, I’m scattering 4M instances of about 6 hair-like objects with processing and rendering ending up around 1 minute at 256 samples. The geometry node angle was a joke to try, but I did try it. The free biome/scatter doesn’t have a viewport percentage so that went out the window quickly, too. Anyway, here’s the WIP and wonderful 3D (not planes) felt.