I have a LineArray defined which is supposed to represent a tree like object. I am trying to display each line segment in the array at a certain time so that the tree would look like its growing. Now I initially use setValidVertexCount( 0 ) so that nothing is displayed, then make the scene live. I have a Behaviour which triggers each second an uses setValidVertexCount() and increments the number of vetices used. This does not seem to work at all, I still see nothing. However if I modify some part of the LineArray, for example the color of a single vertex, and then do a setValidVertexCount() it works!! Could this be a bug, or am I doing something wrong. Do I have to do anything else after I do setValidVertexCount() to get it to update the scene? Also if anyone has better suggestions on how to animate tree growth apart from the method mentioned above I would be very greatfull. I'm using JDK1.3rc3 and Java3d 1.2beta2 on Windows 2000, Celeron 400, TNT2 if thats of any help. Regards, Andrian =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".