title: Can I use 3D coordinates as a CNN input?
body: <p>I am fairly new to neural networks and I am planning to train a network using 3D data (3D face scans in .obj). I don't want to use a 3D CNN but rather transform my data to a image-like structure and train a 2D CNN. With my idea that would require placing my 3D points on a 2D grid so that the input would be just like with images but with XYZ coordinates instead of RGB.
  Is it a sensible idea that could work with CNN? If so, what is the best way to build that 2D projection?</p>