See createMesh.py for an example. The data has to fit in shared memory, hence the limit on Mac is lower than Windows and Linux: #ifdef __APPLE__ #define B3_MAX_NUM_VERTICES 8192 #define B3_MAX_NUM_INDICES 32768 #else #define B3_MAX_NUM_VERTICES 131072 #define B3_MAX_NUM_INDICES 524288 #endif