Currently impress supports the glTF format for 3D models, but the largest amount of 3D models arent in this format, so it would be useful to support a wider range of 3D model formats. I stumbled on Assimp today which is a BSD-licensed C++ 3D import and export library that supports a wide range of formats and believe it maybe possible to integrate this into LO. http://assimp.sourceforge.net/main_features_formats.html
License looks ideal (3-clause BSD); would make a nice GSOC task - perhaps for next year; unless someone wants to take it on. Wrt. rendering / viewing - I wonder what model format they generate from this - but at least the current location of this in avmedia makes some sense here I think - I'd love to have a better, and maintained 3D model render. Thanks for the link =)
It would be very good for what can stand more formats for 3D models, as this functionality has much potential in the area of education in which I develop. Unfortunately the current implementation does not work very well, look: Bug 103670 Although it is far from my favorite OS is good news Paint 3D can create 3D models in gltf format. http://windowsreport.com/3d-file-format-windows-creators-update/
3D model feature is removed: https://cgit.freedesktop.org/libreoffice/core/commit/?id=08a43cc97ccf88faa9d3a04afc3aacd2c885a2d1