| 30 |
|
.I \-d |
| 31 |
|
option may be used to specify the number of ray samples, which |
| 32 |
|
defaults to 262,000. |
| 33 |
< |
Calculation time is roughly proportional to accuracy, and the |
| 34 |
< |
default is fine enough to find sources the size of the sun |
| 33 |
> |
Calculation time is roughly proportional to this setting, and the |
| 34 |
> |
default is fine enough to resolve sources the size of the sun |
| 35 |
|
(half a degree) or larger. |
| 36 |
|
.PP |
| 37 |
|
The |
| 38 |
|
.I \-t |
| 39 |
|
option may be used to manually set the radiance threshold for |
| 40 |
|
sources, in watts/sr/meter^2. |
| 41 |
< |
The default uses the top 1 percentile of the environment, which |
| 41 |
> |
The default uses the top 2 percentile of the environment, which |
| 42 |
|
is usally a good value. |
| 43 |
|
.PP |
| 44 |
|
The |
