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Next: 1.20 Lens Effects Up: 1. Functionality Previous: 1.18 User-Defined Shaders

1.19 The Camera

The  camera is fixed at the origin, looking down the negative Z axis, with up being the positive Y axis, in its own coordinate space called `` camera space''. The camera can be placed anywhere in  world space using an  instance transformation, in the same way that objects are placed anywhere in world space. (For backwards compatibility with mental ray 1.x, there is also a mode where camera space and world space are always identical.)

By default, the camera is a pin-hole perspective  camera for which the  focal length,  aperture and  aspect ratio may be specified in either the camera construct of the input file or on the command line of mental ray. Optionally,  lens effects such as  depth of field can be achieved by specifying one or more lens shaders.



Copyright 2002 by mental images