402 |
|
.LP |
403 |
|
.UL Mirror |
404 |
|
.PP |
405 |
< |
Mirror is used for planar surfaces that produce secondary |
405 |
> |
Mirror is used for planar surfaces that produce virtual |
406 |
|
source reflections. |
407 |
|
This material should be used sparingly, as it may cause the light |
408 |
|
source calculation to blow up if it is applied to many small surfaces. |
426 |
|
.UL Prism1 |
427 |
|
.PP |
428 |
|
The prism1 material is for general light redirection from prismatic |
429 |
< |
glazings, generating secondary light sources. |
429 |
> |
glazings, generating virtual light sources. |
430 |
|
It can only be used to modify a planar surface (i.e., a polygon or disk) |
431 |
|
and should not result in either light concentration or scattering. |
432 |
|
The new direction of the ray can be on either side of the material, |
433 |
|
and the definitions must have the correct bidirectional properties |
434 |
< |
to work properly with secondary light sources. |
434 |
> |
to work properly with virtual light sources. |
435 |
|
The arguments give the coefficient for the redirected light |
436 |
|
and its direction. |
437 |
|
.DS |