Is there a public library of LEGO parts ready to be imported to 3d editor? I just found for myself mecabricks.com. Amazing! However I wonder where do they take models of their parts from? Are they all self-designed (and proprietary) or come from some open source? Is there any open library of parts ready to be imported into a 3d editor?
Most, but not all, existing LEGO oriented 3D modelling systems make use of the open source LDRAW libraries. Downloads, specifications, and more information can be found at https://ldraw.org/