1. A method in an image processing system for defining and viewing geometry of an object model produced using an image generator hosted on a image processing computer, the image processing system having a first data processing computer connected via a network to the image processing computer, the method comprising: displaying at least one view of the object model; defining a zone of the object model using the at least one view; defining a slice of the object model in relation to the zone; defining a camera viewpoint in association with the slice so that the camera viewpoint has a position and an orientation relative to the zone; and generating, via the first data processing computer, a command sequence to cause the image generator to produce a geometric image of the object model in accordance with the camera viewpoint.