3ds Max settings (Environment tab) – When selected, Corona will use uses the environment color or map specified in the 3ds Max Environment and Effects window.
Single map – When selected, Corona will use uses the environment color or map slot next to this radio button.
Multiple maps (LightMix) – When selected, multiple environment maps will be are used. They should be split into multiple LightSelect Light Select render elements.
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Enabling the "Multiple maps (LightMix)" option and clicking on the "2 maps" button opens button opens a "Corona Multiple Environment Maps Setup" window, which lets you use two or more environment maps in your scene. To learn more, see: "How to set up multiple environments" at the Chaos Help Center.
Excluding Objects from Environment Illumination
0 objects excluded... – Exclude/Include list of scene objects lit by the environment.
"+" button – Adds the currently selected objects to the Exclude/Include list of objects lit by the environment.
Accurate sampling (slower) – This option enables accurate sampling of environment maps. It is slower but more accurate for high detail maps. This can make lighting and shadows from environment maps sharper, specifically for small light sources(s) in the map (e.g. the sun). Enable it if there is flickering in the lighting.
Overrides
Direct visibility override – When enabled, the color or map next to this checkbox will be is used as an override for the environment map visible directly from the camera.
Reflections override – When enabled, the color or map next to this checkbox will be is used as an override for the environment map visible in reflections.
Refractions override – When enabled, the color or map next to this checkbox will be is used as an override for the environment map visible in refractions.
Global volume material – When enabled, the material placed next to this checkbox will be is used as the global volumetric medium for the scene. Useful for simulating fog or aerial perspective.
