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Don't be daft, people don't stop developing in an area just because it has been approached before and besides, this stuff is way ahead of the tech in Autodesk 123D.

You might as well complain that people are still developing video compression techniques.

Yes, very similar. However there is still room for improvement. Maybe Disney found a solution to make cleaner models, leading to a 3d-print ready solution. With 123D you need to spend time on cleaning the mesh.

ps. this seems to be an open source version of 123D http://insight3d.sourceforge.net/ Interesting, but havent used it yet

Gahh! 9 out of 10 times, software made in academia has cool features but awful code/structure/packaging/younameit. In this case, the Linux (!) tarball contains Windows binaries and a handwritten Makefile that is not able to compile even the first source file. What a pity.

Pity every photo you upload to that service gets made public.