| 118 |
|
|
| 119 |
|
.IP "\fB\-apM \fImaxprepass\fR" |
| 120 |
|
Maximum number of iterations of the distribution prepass before terminating |
| 121 |
< |
if some photon maps are still empty. This option is rarely needed as a |
| 122 |
< |
an aborted prepass indicates an anomaly in the geometry or an |
| 121 |
> |
if some photon maps are still empty. This option is rarely needed as |
| 122 |
> |
an aborted prepass may indicate an anomaly in the geometry or an |
| 123 |
|
incompatibility with the specified photon map types (see \fBNOTES\fR below). |
| 124 |
|
|
| 125 |
|
.IP "\fB\-apo \fImod\fR" |
| 306 |
|
\fB\-apM\fR option. |
| 307 |
|
|
| 308 |
|
.SS Material Support |
| 309 |
< |
The \fIplasfunc\fR, \fImetfunc\fR, \fItransfunc\fR, \fIbrtdfunc\fR, |
| 310 |
< |
\fIplasdata\fR, \fImetdata\fR and \fItransdata\fR materials are not |
| 311 |
< |
supported by the photon mapping extension. Use the newer \fIbsdf\fR material |
| 309 |
> |
Not all materials are fully supported by the photon map extension. The |
| 310 |
> |
\fIplasfunc\fR, \fImetfunc\fR, \fItransfunc\fR, \fIplasdata\fR, |
| 311 |
> |
\fImetdata\fR and \fItransdata\fR materials currently only scatter photons |
| 312 |
> |
diffusely, and will not produce caustics. The \fIbrtdfunc\fR material only |
| 313 |
> |
produces caustics via ideal (mirror) specular reflection and transmission. |
| 314 |
> |
For more realistic scattering behaviour, use the newer \fIbsdf\fR material |
| 315 |
|
instead. |
| 316 |
|
.PP |
| 317 |
|
Virtual light sources (normally enabled with the \fImirror\fR material) are |
