Depth Slope Depth slope is the change in z depth divided by the change in either the x or y coordinate       Polygons parallel to the near/far clip planes have a depth slope of zero Some experimentation may be necessary for some scenes

	Homework Make your own copies of the OpenGL redbook examples from /usr/share/src/GLUT/redbook from Origin3 Make sure you execute each of the examples from this chapter: alpha.c alpha3D.c aargb.c aaindex.c aapoly.c fog.c fogindex.c polyoff.c      Extra Credit:  Take the example from session 4 and enable antialising and fog.  Enable a black fog to produce a depth-cueing effect

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