- Texture Limit
Automatically scales textures down so that they are no larger than the values chosen. This can help reduce computer memory resources when rendering large scenes with huge textures.
- Use Camera Cull
Automatically culls objects based on the camera frustum defined by the Margin.
- Use Distance Cull
Automatically culls objects based on their distance from the active camera. This is set via the Distance property.
There are also several non renderer specific settings which are documented here.