A fellow student approached me today wanting to know if matplotlib was able to produce a certain kind of 3d plot where a filled contour was placed on one of the axes panels. I knew it was possible with regular contours, but was surprised when I realized that the same feature wasn’t available for contourf. So I wrote a patch to add that feature (and clean up a few documentation-related things). I also added an example script with examples/mplot3d/contourf3d_demo2.py.
This is the image produced by the example:
This was committed in r8915.