Multigen Paradigm Creator v3.0 *iSO*

MultiGen Creator is the industry's leading software for creating highly optimized,
high fidelity realtime 3D content for use in visual simulation, urban simulation
and other applications. The integrated and extensible toolset puts more interactive
realtime 3D modeling power in your hands than any other modeler.

MultiGen Creator simulates almost all realtime rendering techniques for true
WYSIWYG interactive modeling, enabling you to build within your world and
preview interactively within your developing scene. Changes appear in
realtime as you make them, improving your productivity by reducing the
number of modeling system and target application viewing iterations.

http://www.multigen.com/products/database/creator/index.shtml