| An Efficient Brush Model for Physically-Based 3D Painting Recent countries visiting this post |  |
 | 3 | United States |
 | 1 | Germany |
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| An Efficient Brush Model for Physically-Based 3D Painting Recent countries visiting this post | |
| 3 | United States |
| 1 | Germany |
| 1 | Japan |
| 1 |