Hello, i have written an robotic simulation, that use the WakeupOnCollisionEntry criterion. But it seem that this consumes 100 percent cpu-time (Windows 98 + NT) without doing something in my scene. Is it possible to trigger the collision detection after movement in my scene ? Greetings, Norbert P.S. Sorry for my english ! ===================================================================== To subscribe/unsubscribe, send mail to [EMAIL PROTECTED] Java 3D Home Page: http://java.sun.com/products/java-media/3D/