Perspective views, such as block diagrams and fence diagrams have always been an important means of scientific visualiza- tion in geology. Advanced three-dimensional computer gra- phics is a new tool for the construction of such views. The book contains papers presented at the first large interna- tional meeting (Freiburg, October 8-11, 1990) that brought together working groups engaged in development of 3-D visua- lization programs for geologic purposes, and included people fromuniversities, government agencies, the mining industry (especially oil companies) and from software companies...