| 595 |
|
.I \-ac. |
| 596 |
|
Note that this is approximate as the number of cache pages is rounded to |
| 597 |
|
the nearest prime. This allows adapting the cache to the available physical |
| 598 |
< |
memory. In conjunction with the |
| 599 |
< |
.I \-n |
| 600 |
< |
option, this is the cache size |
| 601 |
< |
.I per parallel process. |
| 602 |
< |
Cache performance is less sensitive to this parameter, |
| 603 |
< |
and reasonable performance can obtained with as few as 10k photons. The |
| 604 |
< |
default is 1M. This option recognises multiplier suffixes (k = 1e3, M = |
| 605 |
< |
1e6), both in upper and lower case. |
| 598 |
> |
memory. Cache performance is less sensitive to this parameter, and reasonable |
| 599 |
> |
performance can obtained with as few as 10k photons. The default is 1M. This |
| 600 |
> |
option recognises multiplier suffixes (k = 1e3, M = 1e6), both in upper and |
| 601 |
> |
lower case. |
| 602 |
|
.TP |
| 603 |
|
.BI -me " rext gext bext" |
| 604 |
|
Set the global medium extinction coefficient to the indicated color, |
| 662 |
|
termination, and the |
| 663 |
|
.I -lw |
| 664 |
|
setting (below) must be positive. |
| 665 |
< |
If N is a negative integer, then this sets the upper limit |
| 666 |
< |
of reflections past which Russian roulette will be used. |
| 665 |
> |
If N is a negative integer, then this limits the maximum |
| 666 |
> |
number of reflections even with Russian roulette. |
| 667 |
|
In scenes with dielectrics and total internal reflection, |
| 668 |
|
a setting of 0 (no limit) may cause a stack overflow. |
| 669 |
|
.TP |
