A set of advanced rendering
options are provided on the General tab of the 3D View Properties property
sheet. This area of the interface will appear as shown on the right. The
three check boxes can be used to control global properties of rendering
such as parallel versus perspective projection, the use of triangle strips,
and immediate mode versus display lists. These options are described below.
Use parallel projection: When checked a parallel camera projection matrix is used for rendering. With a parallel (also referred to as orthographic) projection is used, objects do not get smaller as they get farther away. When this option is not checked, a perspective camera projection is used which is more typical of how we see the world through our eyes.
Use triangle strips: When checked all triangles will be converted to triangle strips before rendering. This may improve your rendering performance since less information needs to be passed to the graphics board with triangle strips. The image rendered with triangle strips will not necessarily be the same as the one rendered with triangles if this box is unchecked, especially when flat shading is employed. Note that this option will control how data for rendering will be generated in the future, but it will not cause existing pipeline elements to execute again to either produce or eliminate triangle strips.
Use immediate mode rendering: When checked no display lists will be generated, and the data object will be traversed and rendered for each frame. When unchecked, a display list will be generated for the primitives. When an object does not change frequently, using display lists generally increases performance. The initial creation of the display list can be slow on some platforms.