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From Odwiki

Are the maths on this page completely off, maybe?

RMan has only shading rate, not shading quality. Assuming the 1st sentence in this article is right and shading quality in Mantra refers to shading frequency per axis of a pixel and with shading rate in RMan is specified as u-poly size in pixels square.

rman_shading_rate      = 1 / pow( mantra_shading_quality, 2 )
mantra_shading_quality = sqrt( 1 / rman_shading_rate )

Mauritius 00:27, 27 December 2009 (PST)