| 66 |
|
The |
| 67 |
|
.I \-a |
| 68 |
|
option turns off reciprocity averaging for isotropic scattering or anisotropic reflection. |
| 69 |
< |
Normally on (+a), this ensures that the tensor BRDF obeys Helmholtz reciprocity. |
| 70 |
< |
However, in certain rare cases, reciprocity averaging can cause unwanted noise in the output. |
| 69 |
> |
Normally on (+a), this ensures that each tensor-tree hemisphere follows symmetry |
| 70 |
> |
implied by Helmholtz reciprocity, and is designed to reduce noise in measured data. |
| 71 |
> |
However, for some data, reciprocity averaging can actually make the output worse. |
| 72 |
|
.PP |
| 73 |
|
The maximum resolution of the tensor tree may be controlled by the |
| 74 |
|
.I \-g |
