Google Photorealistic 3D lighting?

I’m new to Cesium. When I load Google Photorealistic 3D tiles into a Unity project they are very dim. The Directional light in the scene has no affect on the tiles.
How can I fix?

FYI - when I load Cesium World Terrain tiles they appear well lit.

Hi @scottstillstanding, welcome to the community!
Can you share a screenshot of what you’re seeing? The Google tiles use an “unlit” mode, so it’s expected that they are unaffected by lighting. However, they shouldn’t be particularly dark compared to Cesium World Terrain / Bing Maps. It would help to know where on Earth you’re looking, too, because Google gets their imagery data from a variety of sources, so some areas might be darker than others.

I’d messed around with the Environment Lighting settings in Unity and found the Environment Lighting - Source was set to Skybox. I changed the source to Color, and tiles are now ‘lit’.
Thank you.