| 3ds Max C++ API Reference
    | 
| Macros | |
| #define | OPTIMIZE_SAVEMATBOUNDRIES (1<<0) | 
| Specifies that faces won't be collapsed across a material boundary. | |
| #define | OPTIMIZE_SAVESMOOTHBOUNDRIES (1<<1) | 
| Specifies that faces won't be collapsed across a dissimilar smoothing group boundary. | |
| #define | OPTIMIZE_AUTOEDGE (1<<2) | 
| Specifies that the edge visibility should be set automatically based on the angle between adjacent surface normals. | |
| #define OPTIMIZE_SAVEMATBOUNDRIES (1<<0) | 
Specifies that faces won't be collapsed across a material boundary.
| #define OPTIMIZE_SAVESMOOTHBOUNDRIES (1<<1) | 
Specifies that faces won't be collapsed across a dissimilar smoothing group boundary.
| #define OPTIMIZE_AUTOEDGE (1<<2) | 
Specifies that the edge visibility should be set automatically based on the angle between adjacent surface normals.
This will only set edges as invisible