Pictures for Chapter 20

Thumbnail	Number	Link	Thumbnail	Number	Link
	20.1	JPG (88 K)		20.2	PDC, KTH, VR-Cube
	20.3b	Computer Graphics Lab EPFL		20.4	GIF (47 K)
	20.5	GIF (61 K)		20.6	GIF (25 K)
	20.7	GIF (19 K)		20.8	GIF (64 K)
	20.9	GIF (35 K)