TripoSG-Scribble ( https://huggingface.co/spaces/VAST-AI/TripoSG-scribble Demonstration and Documentation: https://github.com/VAST-AI-Research/TripoSG) generates 3D images from a freehand drawing or photo and instruction.

Optional instruction.
Adjustment of fidelity to drawing/image and instruction.
Export format glb.

Open source, free and unlimited.

Source of images for the tests, Wikimedia Commons:
– https://commons.wikimedia.org/wiki/File:Lilac-breasted_roller_(Coracias_caudatus)_Kruger.jpg
– https://commons.wikimedia.org/wiki/File:Rom_(IT),Kolosseum—2024–_0610.jpg
– https://commons.wikimedia.org/wiki/File:Common_yellow_gilder_(Cymothoe_egesta_egesta)_underside_2.jpg