Cesium with Path Tracing

Hello guys, how you doing?
I’m trying to render a short film in path tracing para Cesium isn’t reacting properly with indirect light.
I realized when I didn’t see the terrain reflecting on the surface of the car. Can someone help me?

I haven’t used path tracing much, but my first guess is that perhaps the terrain isn’t (directly) in view, so it is being culled. See here for an explanation and workaround: