Microscale
to Object Scale
§Microgeometry of Velvet
§The
microgeometry sampled by a virtual
gonioreflectometer.
§The output, a
bidirectional reflectance distribution
function or BRDF, can be used to generate images of velvet objects." 
§Object Scale Geometry of Velvet
§Created using the BRDF derived from the velvet microgeometry.
§Using this technique, we can create arbitrarily complex BRDFs by modelling the surface microgeometry and then passing it to the virtual gonioreflectometer.
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