--- ray/doc/ray.html 2011/06/22 00:12:06 1.13 +++ ray/doc/ray.html 2011/06/22 00:12:43 1.14 @@ -1093,7 +1093,7 @@ unless the line integrals consider enclosed geometry. placed slightly less than the given thickness away from the front surface to enclose the complex geometry on both sides. The sign of the thickness is important, as it indicates - whether the proxied geometry is behind the BSDF + whether the proxied geometry is behind the BSDF surface (when thickness is positive) or in front (when thickness is negative).