Point Clouds with eye dome lighting and attenuation are not visible in 2D

[ggetz]

What happened?

When specifying 2D mode with viewer.scene.mode = Cesium.SceneMode.SCENE2D; point clouds that have attentuation and eye dome lighting enabled are not visible.

This appear to be the case whether projectTo2D: true is provided when creating the tileset or not.

As far as I can tell, this applies to any point cloud dataset.

Reproduction steps

1. Load an example with any point cloud 3D tileset
2. Ensure the scene is initialized in 2D with viewer.scene.mode = Cesium.SceneMode.SCENE2D;

Sandcastle example

Example

Environment

Browser: Chrome
CesiumJS Version: 1.119
Operating System: Mac OS