Environment dome and implicit groundplane
NVIDIA Iray features a flexible environment dome as an extension over the conventional infinite spherical environment. Depending on the selected mode, the dome can also be of finite size, where camera movements inside the dome provide a different environment lookup.
As an additional feature of the environment dome an implicit groundplane can be enabled, which can also act as a shadow catcher. It is also able to provide other illumination effects, such as reflections, of the objects in the scene.