Fade topo elevation shading gradually

[cpmsmith]

This is just an idea: I'm looking at this area in the Alps, and noticing that around zoom level 17, the elevation shading starts to become less legible:

The style accounts for this, and stops shading at all at level 18:

To my eye, the highest zoom level before the shading starts to look a little bit clumsy is somewhere around 14:

I wonder if it would help to gradually fade the opacity of the shading down through levels 14–18, rather than just disabling it entirely at one level.

NB: there are certainly a few variables here, most significantly:

1. I'm looking at a region with extreme elevation changes, and therefore extreme shading
2. The "legibility" or "clumsiness" of the shading is definitely dependent on the resolution of the elevation data, which I assume isn't consistent globally

[quinncnl]

Hi! Thanks for the suggestion. Indeed the elevation labels are sometimes illegible with hillshades. Will try to fix that and phase out hillshades gradually.