I have used blender for some 3d printing projects. Shapeways has several articles describing the process and highlighting some of the issues (eg https://www.sha

I have used blender for some 3d printing projects. Shapeways has several articles describing the process and highlighting some of the issues (eg https://www.shapeways.com/tutorials/prepping_blender_files_for_3d_printing https://www.shapeways.com/tutorials/prepping_blender_files_f...). However, while I think it's very good for animation/rendering purposes, it is missing a lot of things you might expect in a full CAD app. I use it to build meshes and then describe how to deform it. It has some procedural constraints. I recall it has some snapping behavior, and googling around shows some plugins that try to add some of this missing CAD functionality, but I can't really judge their success. Maybe see also - https://blender.stackexchange.com/questions/53293/is-blender-actually-useable-for-engineering https://blender.stackexchange.com/questions/53293/is-blender...