Created attachment 206966 [details] point-mapping results It seems some detail / contour missing from the actual results after changing "non-composited contents" in CoordinatedLayerTreeHost. transforms/3d/point-mapping/3d-point-mapping-2.html transforms/3d/point-mapping/3d-point-mapping-3.html transforms/3d/point-mapping/3d-point-mapping-coplanar.html transforms/3d/point-mapping/3d-point-mapping-deep.html transforms/3d/point-mapping/3d-point-mapping-overlapping.html transforms/3d/point-mapping/3d-point-mapping-preserve-3d.html transforms/3d/point-mapping/3d-point-mapping.html Test results are attached to this bug. Also I add other guys to cc for this bug whose worked on 3d-point-mapping in the past in bug 80315 and 104308.
Created attachment 206967 [details] 3d-point-mapping-deep-actual.png
Created attachment 206969 [details] 3d-point-mapping-deep-expected.png
Sorry, I was wrong about r149292, the problem just turned out after that patch. After running more tests, it seems the failure already existed before the changes.