6 modules - PI-VR GmbH

7.1 Truelight Materialsmode is more accurate but requires more calculation time than single scattering.• Attenuation: The distance that the light travels inside the medium is dependingon the attenuation value. The higher the value, the more light isabsorbed inside the medium.• Asymmetry: This value describes the directional characteristic of incominglight, and its weighted behavior. The value -1 defines that light is completelydistributed to the averted side along the incoming light path. Thevalue 1 defines that light is completely distributed along the incoming lightpath. The value 0 describes a homogeneous distribution of light inside themedium.• Select Medium: The medium presets offer you a large collection of commonindex of refraction values to choose from.• Index of refraction: The refraction index defines the ’optical density’ andtherefore the way light is refracted when passing differently dense materials.• Use Texture: Loads an image texture for the diffuse color channel. Usesthe image as pattern on the surfaces.· Repeat Mode UV: Sets the repeat mode of the texture. There are fourmodes, which can be set:· Repeat: Repeats the texture in all directions.· Mirrored Repeat: Repeats and mirrors the texture on the x- andy-axis with every repetition.· Decal: The texture will not be repeated.· Clamp: Repeats only the last pixel of the texture will be repeated.· Link repeat modes: Uses the same repeat mode for v-coordinates as forthe u-coordinates.· Repeat UV: Sets the number of repetitions for the Uvs.· Offset UV: Sets the offset for the UVs.223