How to Display Point Clouds Underground with Depth Test Enabled?

CesiumJS
1

I am looking for a way to display underground point clouds while keeping depth testing against terrain enabled.

Background

If I set depthTestAgainstTerrain = false, BillboardGraphics beyond the terrain become visible, negatively affecting the scene’s appearance.
Thus, I need a solution to display underground point clouds while keeping depthTestAgainstTerrain = true.

Conditions

The solution should prevent the point cloud from being hidden by the terrain without manually adjusting its height, under the following conditions:

  • terrainProvider is set to CesiumWorldTerrain.
  • viewer.scene.globe.depthTestAgainstTerrain = true.
  • The point cloud is converted into 3D Tiles using the 3D Tiling Pipeline.

Thank you for reading!

2

Have you had a look at this Sandcastle Example about the Globe Translucency?