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Revision 1.10 by greg, Wed Apr 6 22:00:46 2011 UTC vs.
Revision 1.11 by greg, Wed Apr 6 22:03:04 2011 UTC

# Line 1063 | Line 1063 | unless the line integrals consider enclosed geometry.
1063          Real arguments to this material may define additional
1064          diffuse components that augment the BSDF data.
1065          String arguments are used to define thickness for proxied
1066 <        surfaces and the "up" orientation for the material.
1066 >        surfaces and the &quot;up&quot; orientation for the material.
1067  
1068   <pre>
1069          mod BSDF id
# Line 1076 | Line 1076 | unless the line integrals consider enclosed geometry.
1076   </pre>
1077  
1078   <p>
1079 <        The first string argument is a "thickness" parameter that may be used
1079 >        The first string argument is a &quot;thickness&quot; parameter that may be used
1080          to hide detail geometry being proxied by an aggregate BSDF material.
1081          If a view or shadow ray hits a BSDF proxy with non-zero thickness,
1082          it will pass directly through as if the surface were not there.
# Line 1095 | Line 1095 | unless the line integrals consider enclosed geometry.
1095   <p>
1096          The second string argument is the name of the BSDF file, which is
1097          found in the usual auxiliary locations.
1098 <        The following three string parameters name variables for an "up" vector,
1098 >        The following three string parameters name variables for an &quot;up&quot; vector,
1099          which together with the surface normal, define the
1100          local coordinate system that orients the BSDF.
1101          These variables, along with the thickness, are defined in a function
# Line 1116 | Line 1116 | unless the line integrals consider enclosed geometry.
1116   <p>
1117          The surface normal of this type is not altered to face the incoming ray,
1118          so the front and back BSDF reflections may differ.
1119 <        (Transmission is identical front-to-back by physical law.)\0
1119 >        (Transmission is identical front-to-back by physical law.)
1120          If back visibility is turned off during rendering and there is no
1121          transmission or back-side reflection, only then the surface will be
1122          invisible from behind.

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