I wonder if it is possible to create a mesh with a surface following the ground elevation. The goal for this is to create a mesh for a specific area (defined by a rectangular area), create meshes for different altitudes (e.g. 10m above ground) and project a raster onto this irregular surface (either using WMS or a Image Provider). I tried to find something similar in this forum or on Cesium JS samples, but couldn’t find anything really useful.
It seems like you wanna create heatmap on the basis of terrain elevation values. If it is, you may check this repo link and this post also. I personally haven’t tried this.