| Submitted by , posted on 26 March 2001 |

Image Description, by We've been pretty busy recently writing new demo material for Umbra, our visibility determination system for dynamic environments. Above are shots from two of the demos; the top row displaying an urban scene with 16,000 buildings and 4,000 moving cars (and a rather hacked traffic light system). The bottom row contains shots of Grand Canyon -- we wanted to see how well generic occlusion culling algorithms work with terrains. The terrain is by no means static; one can pick up pieces of it with a mouse and see how the changed geometry affects the visible set of the terrain.
More images, these and other demos, the new 500-page manual of the system, API headers etc. can all be downloaded from http://surrender3d.com/umbra .
cheers,
-wili

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