I encountered a missing attribute bug while using matplotlib 1.5.3 on linux. New to the community so apologies if this isn't the right way to raise the issue, I did read the [coding guidelines] (http://matplotlib.org/devel/coding_guide.html) but it was still unclear for small bugfixes what the procedure is.

I found I was getting a missing _facecolor2d attribute error in the Patch3D class in mplot3d/art3d.py. It seems like the attribute just wasn't being set so I added it (diff below) and it resolved the problem.

There is a FIXME comment related to facecolor2d just below this point in the code, so someone may have had another fix in mind.

diff --git a/lib/mpl_toolkits/mplot3d/art3d.py b/lib/mpl_toolkits/mplot3d/art3d.py
index 4ecfb32..73daa6e 100644
--- a/lib/mpl_toolkits/mplot3d/art3d.py
+++ b/lib/mpl_toolkits/mplot3d/art3d.py
@@ -266,6 +266,7 @@ class Patch3D(Patch):
         self._segment3d = [juggle_axes(x, y, z, zdir) \
                 for ((x, y), z) in zip(verts, zs)]
         self._facecolor3d = Patch.get_facecolor(self)
+        self._facecolor2d = self._facecolor3d
 
     def get_path(self):
         return self._path2d