Advanced hillshading example looks strange with new defaults.

[jenshnielsen]

Compare:
http://matplotlib.org/devdocs/examples/specialty_plots/advanced_hillshading.html
to
http://matplotlib.org/examples/specialty_plots/advanced_hillshading.html

This is likely related to the change in blend mode

[mdboom]

I think there's actually two style changes affecting this: the change of blend_mode from hsv to overlay, and the change of interpolation from bilinear to nearest.

As to how to fix: does it make sense to just explicitly pass the old defaults to restore the old behavior?

[jenshnielsen]

Yes probably I will investigate it

[tacaswell]

@njsmith Can you comment on this one? I think the change was at your request.

[njsmith]

Unfortunately I know nothing about hill shading, my only contribution was to point out that the source code had a comment saying that the default was unfortunate and should be changed when possible. I'd look to see who wrote that comment I guess :-)