| Self Shadowing and Local Illumination of Randomly Rough Surfaces Recent countries visiting this post |  |
 | 5 | United States |
 | 2 | |
 | 1 | China |
 | 1 | Russian Federation |
| Self Shadowing and Local Illumination of Randomly Rough Surfaces Recent countries visiting this post | |
| 5 | United States |
| 2 | |
| 1 | China |
| 1 | Russian Federation |