The VRayScannedMtl material applies material information gathered by the Chaos VRscans system to an object. The VRscans system captures the appearance of an actual physical material sample, going beyond single-point BRDF capture to faithfully represent the textured appearance of a real-world surface using bidirectional texture function (BTF) approximation. The information is saved in a .vrscan file, which the VRayScannedMtl material then reads to reproduce the material in the rendering.
The VRscans system and VRayScannedMtl material are intended as a solution for users who need to exactly match a given real-world sample.
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VRayScannedMtl requires a separate VRscans license. The material still renders without a license, but it includes a watermark and the material's UI does not display.
The scanned material simply stores information about the way a physical material responds to light at individual points on the surface; it has no notion of components that extend across the surface such as diffuse or reflection qualities, or normal or bump maps. The scanned material is simply a faithful representation of how each point on the object responds to light. The .vrscan files tend to be quite large.
