Road mask - feature request

[bwyss]

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name: Road Mask Feature Request
about: Similar to the water mask, the road mask would allow a separate rendering style for roads.

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The Problem To Be Solved
The problems is that there is not a way to distinguish "types" of terrain with the expiation of water. I would like the ability to render road terrain differently than ground terrain.

Suggested Solution
Develop a road mask, similar to the water mask

[kring]

I think a good way to think about this is that it should be integrated into Cesium's imagery system, rather than built into the quantized-mesh format. Cesium's ImageryCollection lets you drape arbitrary raster layers on top of the terrain, but currently they're always treated as color maps and blended accordingly. A very cool extension of the imagery system would allow the layers to be used as input to Cesium Materials, so that the globe could be rendered with arbitrary or custom shaders.