You can do 3D modeling with OpenSCAD, which uses plaintext files as source code for 3D models. So yes, you can edit these .scad files with vim. If you then want to compile and preview your model, you can just open the official OpenSCAD editor and close the text pane. It’ll automatically watch the file you’re editing for changes, compile it, and give you a preview of the model that you can rotate and move around.

The other software mentioned in the last panel is cadquery. It’s a Python library for creating 3d models. But it’s much slower and buggier than OpenSCAD, and, in my opinion, less intuitive.