Convert USD geometry to Bifrost geometry

You can convert geometry loaded from a USD file to Bifrost geometry so that it can be modified in the graph.

• read_usd_meshes converts USD meshes to Bifrost meshes.
• read_usd_curves converts USD curves to Bifrost strands.

In either case:

• Connect the stage that contains the prim to convert to the stage port.
• Set prim_path to the path of the prim to convert.
• Connect any prefixes of paths to exclude to the exclude_prefixes port.
• Set the frame number. If the geometry is animated, you can connect the frame output of a time node to use the current time in the scene.