| 19 |
|
][ |
| 20 |
|
.B "{+|-}C" |
| 21 |
|
][ |
| 22 |
+ |
.B "{+|-}a" |
| 23 |
+ |
][ |
| 24 |
|
.B "{+|-}forward" |
| 25 |
|
][ |
| 26 |
|
.B "{+|-}backward" |
| 77 |
|
The default option |
| 78 |
|
.I \-C |
| 79 |
|
reduces all BSDF data to grayscale. |
| 80 |
+ |
.PP |
| 81 |
+ |
The |
| 82 |
+ |
.I \-a |
| 83 |
+ |
option turns off reciprocity averaging for tensor tree output. |
| 84 |
+ |
Normally on (+a), this ensures that the tensor BRDF obeys Helmholtz reciprocity. |
| 85 |
+ |
However, in certain rare cases, reciprocity averaging can cause unwanted noise in the output. |
| 86 |
|
.PP |
| 87 |
|
The geometry must fit a rectangular profile, whose width is along the X-axis, |
| 88 |
|
height is in the Y-axis, and depth is in the Z-axis. |
