| Normal
											deviation All geometry has the same normal
										deviation. Normal deviation is the angle between the normals
										of the edges that define the triangular geometry of
										Composer. When you move the slider to high quality, you decrease
										the normal deviation and increase the quality of the
										assembly. In the image, the black circle is the
										original geometry. The blue triangles define the geometry in
										Composer. The normal deviation is the angle between the red
										arrows. 
 The difference between these two
										triangulation methods is visible for scenes containing
										geometry of various sizes. Consider an assembly of one very
										large cylinder and one very small cylinder. With Chordal
											error, because the chordal error is
										constant, the polygon inscribing the large cylinder has many
										more sides. This results in the geometry of the large
										cylinder looking better than the small cylinder. 
 With Normal
											deviation, because the normal deviation is
										constant, the polygons inscribing both cylinders have the
										same number of sides. This results in the geometry of the
										small cylinder looking better than the large cylinder. 
 You can optimize the geometry degradation by
										moving the slider between high
											quality (for optimum triangulation quality),
											medium, and
											low quality. |