| 1914 |  | utilities consistent with other tools in Radiance. | 
| 1915 |  |  | 
| 1916 |  | Added triangulation routine to handle convex polygons in obj2mesh. | 
| 1917 | + |  | 
| 1918 | + | ****** COMPATIBILITY CHANGE ******** | 
| 1919 | + | Made backface visibility apply to all material types, including | 
| 1920 | + | transparent and translucent materials (except dielectric and interface). | 
| 1921 | + | This makes the option useful in cases where adjacent trans surfaces | 
| 1922 | + | are placed next to each other by a modeler that only understands | 
| 1923 | + | volumetric objects. |