A cesium newbie here, I was wondering if it is possible to add a grid to a GroundPrimitive polygon? I am trying to get a gridded polygon draped on a terrain. I have tried to add material with the scene.primitives.add command but it does not work. Any help would be appreciated.
The GroundPrimitive currently only has support for PerInstanceColorAppearance. We plan on adding support for other appearances, but it might be a little while before we are able to add this.