| 192 |
|
as its alternate material. |
| 193 |
|
The default is |
| 194 |
|
.I l-. |
| 195 |
– |
.TP |
| 196 |
– |
.BI t =real |
| 197 |
– |
Set the surface thickness to |
| 198 |
– |
.I real |
| 199 |
– |
in world coordinates. |
| 200 |
– |
This value is used for determining where to start rays that need to begin |
| 201 |
– |
on the opposite side of a fenestration system, specifically |
| 202 |
– |
to compute the incoming distribution for a BSDF computation. |
| 203 |
– |
If the thickness is set to 0 and a BSDF contains detailed geometry, |
| 204 |
– |
it will be translated and output as part of the new description, provided the |
| 205 |
– |
.I l- |
| 206 |
– |
option is also in effect. |
| 207 |
– |
(This currently works only for rectangular polygons.)\0 |
| 208 |
– |
The default thickness is 0. |
| 195 |
|
.SH EXAMPLES |
| 196 |
|
The following command generates illum's corresponding to geometry |
| 197 |
|
in the files "it1.rad" and "it2.rad": |
