--- ray/doc/ray.html 2014/07/31 18:32:41 1.19
+++ ray/doc/ray.html 2018/06/25 20:49:10 1.25
@@ -1,7 +1,8 @@
+
-The RADIANCE 4.2 Synthetic Imaging System
+The RADIANCE 5.2 Synthetic Imaging System
@@ -9,7 +10,7 @@ The RADIANCE 4.2 Synthetic Imaging System
-The RADIANCE 4.2 Synthetic Imaging System
+The RADIANCE 5.2 Synthetic Imaging System
@@ -797,7 +798,8 @@ unless the line integrals consider enclosed geometry.
Trans2 is the anisotropic version of trans.
- The string arguments are the same as for plastic2, and the real arguments are the same as for trans but with an additional roughness value.
+ The string arguments are the same as for plastic2,
+ and the real arguments are the same as for trans but with an additional roughness value.
mod trans2 id
@@ -809,6 +811,27 @@ unless the line integrals consider enclosed geometry.
+
+ Ashik2
+
+
+
+ Ashik2 is the anisotropic reflectance model by Ashikhmin & Shirley.
+ The string arguments are the same as for plastic2, but the real
+ arguments have additional flexibility to specify the specular color.
+ Also, rather than roughness, specular power is used, which has no
+ physical meaning other than larger numbers are equivalent to a smoother
+ surface.
+
+ mod ashik2 id
+ 4+ ux uy uz funcfile transform
+ 0
+ 8 dred dgrn dblu sred sgrn sblu u-power v-power
+
+
+
+
+
Dielectric
@@ -1131,6 +1154,37 @@ unless the line integrals consider enclosed geometry.
+
+ sBSDF
+
+
+
+ The sBSDF material is identical to the BSDF type with two
+ important differences. First, proxy geometry is not
+ supported, so there is no thickness parameter. Second, an
+ sBSDF is assumed to have some specular through component,
+ which is treated specially during the direct calculation
+ and when viewing the material. Based on the BSDF data, the
+ coefficient of specular transmission is determined and used
+ for modifying unscattered shadow and view rays.
+
+
+ mod sBSDF id
+ 5+ BSDFfile ux uy uz funcfile transform
+ 0
+ 0|3|6|9
+ rfdif gfdif bfdif
+ rbdif gbdif bbdif
+ rtdif gtdif btdif
+
+
+
+ If a material has no specular transmitted component, it is
+ much better to use the BSDF type with a zero thickness
+ than to use sBSDF.
+
+
+
Antimatter
@@ -1414,6 +1468,7 @@ or:
A mixture is a blend of one or more materials or textures and patterns.
+Blended materials should not be light source types or virtual source types.
The basic types are given below.
@@ -1486,7 +1541,6 @@ A mixfunc mixes two modifiers procedurally. It i
arguments, the red, green and blue values
corresponding to the pixel at (u,v).
-