Ok i just re read this, makes sense nowA poygon is a base unit of geometry comprised of 3 sides with 3 points. It is the base unit because moving any point or edge cannot bend the triangle only re-orient the plane. We model using visible quads to simplify what we are manipulating but a quad is made up of 2 triangles. Real Flight used to only allow 20,000 polys for the entire plane including a simplified shell called a collision mesh. A collision mesh uses a very low number of poly to lighten the mathematical load on the software during collisions for reaction of the collided parts. Not a lot to work with at all. They changed that a few versions ago and now allow 130,000 polys. 6.5 times greater than before.