Classification type ignored when depthTestAgainstTerrain is true

[lilleyse]

The classification type is CESIUM_3D_TILE. When globe.depthTestAgainstTerrain is true the polygon classifies both the tileset and terrain, as in the second image.

Sandcastle demo

@bagnell could you check this out?

[bagnell]

This has always been a problem. The stencil shadow volumes use whatever is in the depth buffer so if terrain and 3D Tiles have been drawn with depth rites enabled, then the classification is applied to them. One solution would be to drawn terrain after 3D Tiles, but we would have the opposite problem.

[lilleyse]

I don't know whether or not this is related, but the classification type also gets ignored if world terrain is used.

Sandcastle

[mramato]

BaseLayerPicker automatically enables depthTestAgainstTerrain, so it's the same bug.

[lilleyse]

Ah, alright. Thanks @mramato