OptionalthicknessThe thickness of the volume beneath the surface. The value is given in the coordinate space of the mesh. If the value is 0 the material is thin-walled. Otherwise the material is a volume boundary. The doubleSided property has no effect on volume boundaries. Range is [0, +inf). Default to 0.
OptionalthicknessA texture that defines the thickness, stored in the G channel. This will be multiplied by thicknessFactor. Range is [0, 1].
OptionalattenuationDensity of the medium given as the average distance that light travels in the medium before interacting with a particle. The value is given in world space. Range is (0, +inf). Default to Infinity.
OptionalattenuationThe color that white light turns into due to absorption when reaching the attenuation distance. Default to [1, 1, 1].
Define the
KHR_materials_volumeextension materials options.