matplotlib

I need to create a plot that contains a textured surface in the x-y plane
and on top of that several polygons. Unfortunately there does not seem to
be a method for placing an image within the 3D axes provided by Axes3D. An
interface for such functionality might be:

plt.imshow(my_img, normal_direction=[0,0,1], img_center_pos=[0,0,0])

which indicates that the image surface should be perpendicular to the
direction 0,0,1, and the center of the image should lie at coordinate
[0,0,0].

The meaning of the extent parameter may be interpreted as lying in the
image plane and the x,y, and z axes may be calculated based on the
projection of the image in those directions.