matplotlib · QuLogic · Jun 6, 2020 · May 27, 2020 · May 27, 2020 · Jul 18, 2017
diff --git a/doc/users/next_whats_new/2019-03-25-mplot3d-projection.rst b/doc/users/next_whats_new/2019-03-25-mplot3d-projection.rst
@@ -4,6 +4,13 @@
 Plots made with :class:`~mpl_toolkits.mplot3d.axes3d.Axes3D` were previously
 stretched to fit a square bounding box. As this stretching was done after
 the projection from 3D to 2D, it resulted in distorted images if non-square
-bounding boxes were used.
+bounding boxes were used.  As of 3.3, this no longer occurs.
 
-As of this release, this no longer occurs.
+Currently, modes of setting the aspect (via
+`~mpl_toolkits.mplot3d.axes3d.Axes3D.set_aspect`) in data space are
+not supported for Axes3D but may be in the future.  If you want to
+simulate having equal aspect in data space, set the ratio of your data
+limits to match the value of `~.get_box_aspect`.  To control these
+ratios use the `~mpl_toolkits.mplot3d.axes3d.Axes3D.set_box_aspect`
+method which accepts the ratios as a 3-tuple of X:Y:Z.  The default
+aspect ratio is 4:4:3.
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -1339,10 +1339,6 @@ def set_aspect(self, aspect, adjustable=None, anchor=None, share=False):
         if cbook._str_equal(aspect, 'equal'):
             aspect = 1
         if not cbook._str_equal(aspect, 'auto'):
-            if self.name == '3d':
-                raise NotImplementedError(
-                    'It is not currently possible to manually set the aspect '
-                    'on 3D axes')
             aspect = float(aspect)  # raise ValueError if necessary
 
         if share: