First time making something 3D and code wise, codex has been very useful, even creating a in-game 3D editor as well as netcode

The trickiest part is really using 3D and it comes with lot of extra scoping you normally take for granted: animation, uv texture, rigging for humanoids, making sure stuff doesn't clip through etc.

Still learning Blender but its very slow. I haven't tried the MCP for it yet but I want to get proficient at it to be able to produce psx graphic models and textures...