Open
Description
For projections that need to be clipped to the sphere (armadillo, Berghaus, etc.), we expect the user to add {clip:"sphere"} to each of their geo marks, except Plot.sphere. This is a bit clunky and should be automated.
A first attempt was made in #1150, but too complex.
Maybe the solution is to make these projections not need svg clipping, like I did for the butterfly projections in d3-geo-polygon. https://observablehq.com/@fil/polyhedral-projections-with-d3-geo-polygon