Consider skinning / instancing when sorting objects #28125
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Description
Since #20135 a single material may be represented by multiple programs. In my scene I use the same material with instanced and non-instanced geometry. As a result I see frequent
needsProgramChange = true
inWebGLRenderer.setProgram
.This PR adds skinning and instancing as a secondary criterion for sorting into the default
painterSortStable
just after the material id.