Nodevember is here and I’m collecting this year’s results in this thread. Will always share the blend file with the result.
Let’s start with day 1+2: 3-sided
The 3-sided portal into nodevember-land…
If anybody wants to play around with the scene file, it’s here: day01_3sided.blend (1.3 MB)
Nice work!! 
Second entry is 4-sided. Nothing too crazy, just a 4-sided pyramid with controls for size, height, stone height and length as well as an aging factor, that removes and tilts stones for older pyramids.
As usual blend file for download: day03_4sided.blend (1.3 MB)
So cool man, Nodevember ahahah
Skipped 2 days and did the topic “round” today. Here’s the result, a hay bale:
Day 13, topic is green. Grapes are green. Those below are also green, but I think a biologist wouldn’t call those fruits grapes 
The first 3 images are a bit against Nodevember’s pure rules to not use images, since they use an HDRI from Polyhaven. The last 2 ones are using a Nishity Sky and thus are 100% procedural.
Here’s the blend file:
day13_green.blend (1.6 MB)
Either I’m a bit late or this counts for the blue, black and white topic…
Blue iris, black pupil and white sclera 
Anyhow here’s my procedural eye:
For my current side-project I wanted some pumpkins, so I created a pumpkin generator with geometry nodes. I think it may also classify as a late entry for the medium prompt…
and the blend-file:
pumpkin.blend (1.3 MB)
