Vector tiles: style data

In raster overlay and GPU lookup approach, not an easy way to apply the style. Styling not in an Unreal material. Are we going to stick with the javascript language?

3d tiling styling specification

CesiumJS has styling, running bits of js for every line. We could do this in Cesium native.

Start by reading the 3D tiling styling specification and comparing CesiumJS styling with the raster overlay, GPU lookup, and Unreal material approaches mentioned in the issue. The issue does not identify files, tests, or a concrete implementation path; done would require a decided native styling design for cesium-native.

Written by the indexing model from the issue text.