Hi I implemented 3d mesh splitting using plane. I am splitting mesh using plane from 3 points. Generally i'm checking front and back side polygons and storing it indvisual polygon array . If i'm getting planner polygon then i'm finding intersection point and making new polygon that's it. All working fine But Splitted two part's bottom surface is not closing. I mean where plane intersects with two parts. How can i close this surface ? any idea? If want to see picture i i can post picture . Plase let me know. alex