Is there a local LLM or toolchain to edit 3d models?

I got a lot of ads for meshy recently and went to try it with hilariously bad results. It apparently can't do anything but decorative figurines. I wanted a body shell for an rc car and it just couldn't generate a car without wheels or bottom chassis. It also looks like it can't tell the difference between different car models. It seems like they just have a library of 3d models and have the ai select one based on your description, though i only used their free trial. Next i gave claude a chance. First simply prompting it for an stl, which ran for about an hour and wasted all my tokens for the day before aborting. Then i tried using its coding ability and have it create an openSCAD file that would generate generate a car shell. Which at least managed to generate a square box and then even managed to hollow it out as a square shell on a second prompt. But it never got anything even remotely car shaped. Is there any way to run something similar locally so i can tweak it for my needs? I'm thinking of something similar to image generation in comfyUI, where you can change the workflow to improve how well it understands your prompt. On a side note, i don't understand how generating a 3d car completely failed when local ai can oneshot a 3d model of a plane as long as you tell it to make it fly through a procedurally generated landscape in a game.