PI-VR - VRED Professional 4.2 - PI-VR GmbH

IBL Quality - sets the Sampling Quality of the light samples which are casted
from the currently used SphereEnvironmentMaterial. Only active when "Use
Material Settings" is selected.
Environment Settings - sets the environment settings for HDRI lighting.
Environment - Click Right Mouse Button to select the HDR - Image that should be used as
light source. Read SphereEnvironmentMaterial.
Lighting Mode - the lighting mode menu sets which light model will be used for the shader.
There are five different lighting models.
IBL + Indirect + OpenGL - the shader will be affected by the HDR image, by the pre-calculated
or interactive Global Illumination rendering and by the direct light sources placed in the scene.
IBL + Indirect - the shader will be affected by the HDR Image and by the pre-calculated or
interactive Global Illumination rendering.
IBL + OpenGL - the shader will be affected by the HDR Image and the direct light sources
placed in the scene.
IBL - only the HDR Image will affect the shader.
OpenGL - only direct light sources placed in the scene will affect the shader.