The VRayScannedMtl material allows the rendering of scanned BRDF material data stored in .vrscan files. These files are produced by Chaos' own internal material scanner and accompanying material creator software.
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With V-Ray 6, the Scanned Material doesn't require a separate render from Chaos license to work correctly.
In earlier V-Ray versions, the Scanned Material requires a separate render license to work correctly. Without a license, the material renders with a watermark.
The scanned material renders the captured appearance of an actual physical material sample, that has been scanned with special scanner hardware. The material goes beyond single-point BRDF capture and can faithfully represent the textured appearance of a large number of real-world surfaces using bidirectional texture function (BTF) approximation.
Because the scanned material simply reproduces the way a physical material responds to light, is has no notion of "diffuse" or "reflection" components, "normal" or "bump" maps.
The .vrscan files tend to be quite large as they need to pack a lot of data (they need to describe the BRDF of the material over its entire surface).
For more details on VRscans, please see the Chaos Scans documentation for information on downloadable sample scenes and Frequently Asked Questions or visit the Chaos Scans website.
