5.2.2 Smooth Triangle

There exists a variant, the smooth triangle object, were the virtual surface normal (see (6.3)) at the vertices are also given. Its syntax is:

SMOOTH_TRIANGLE:
  smooth_triangle { 
	  CORNER1, NORMAL1, CORNER2, NORMAL2, CORNER3, NORMAL3 
		[OBJECT_MODIFIERS] }

See also:

• [pov:6.5.2.6]Triangle and Smooth Triangle