Optional
isOptional
isYUpIf this is true, user-defined directions are assumed to be in a Y-up system. This affects how incoming light directions are treated when rendering the sky view lookup table and how uv coordinates are computed from view directions when reading the lookup table.
Defaults to true.
If this is true, user-defined directions are assumed to be in a right-handed system. This affects how incoming light directions are treated when rendering the sky view lookup table and how uv coordinates are computed from view directions when reading the lookup table.
Defaults to true.