Scope for Improvement

• Artificial intersections which are seen in the final output can be prevented from being displayed by flagging them in the intersection routine and using this information while rendering.
• Support for objects containing concave polygons can also be included by extending the plane-polygon intersection routine to concave polygons.
• Also, the algorithm can be implemented in a non-recursive way by using a stack of pointers to BSP_tree. This can be faster on some processors.