OpenUSD Light & Camera

Create cameras (UsdGeomCamera) with standard lens properties, DistantLight SphereLight with angle/radius, intensity, and color controls, plus DomeLight with HDR environment texture and exposure controls. Also provides set_transform for positioning any Xformable prim and set_visibility for beauty/FX layer control on Imageable prims. Requires the pxr OpenUSD runtime.

Workflow

1. Ensure a stage exists.
2. Create a camera with create_camera and place it with set_transform.
3. Create lights (create_distant_light, create_sphere_light, or create_dome_light) and place them.
4. Use set_transform to position any Xformable prim.
5. Use set_visibility to include or exclude Imageable prims from a render layer.