Add a what's new entry for 3D collection modification.

QuLogic · QuLogic · commit 7cc0b869b65b · 2020-09-17T03:10:34.000-04:00
diff --git a/doc/users/next_whats_new/mplot3d_modification.rst b/doc/users/next_whats_new/mplot3d_modification.rst
@@ -0,0 +1,8 @@
+3D Collection properties are now modifiable
+-------------------------------------------
+
+Previously, properties of a 3D Collection that were used for 3D effects (e.g.,
+colors were modified to produce depth shading) could not be changed after it
+was created.
+
+Now it is possible to modify all properties of 3D Collections at any time.
