Sorry for asking the installation problem again since I have seen there are tons of this question in the past... But I followed the steps in Windows and still can't make the things work. A) Installing the packages 1. install JDK1.3 2. set path to include c:\jdk1.3\bin (where I installed JDK) 3. install J3D 1.2 4. set CLASSPATH = . (suggested by "README.Java3D-jdk.OpenGL.txt") B) Try to run sample programs I can successfully compile the demo program, say: C:\jdk1.3\demo\java3d\Appearance\AppearanceTest.java but after that, I do run it and it says: Exception in thread "main" java.lang.NoClassDefFoundError:javax/media/j3d/SceneGraphObject C) Modify CLASSPATH Then I try the following change: set CLASSPATH=.\C:\jdk1.3\jre\lib\ext\j3dcore.jar;C:\jdk1.3\jre\lib\ext\j3dutils.jar;C:\jdk1.3\jre\lib\ext\vecmath.jar Exception in thread "main" java.lang.UnsatisfiedLinkError: no J3D in java.library.path at java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System.loadLibrary(Unknown Source) at javax.media.j3d.UniverseManager$1.run(UniverseManager.java:155) at java.security.AccessController.doPrivileged(Native Method) at javax.media.j3d.UniverseManager.<init>(UniverseManager.java:152) at javax.media.j3d.VirtualUniverse$2.run(VirtualUniverse.java:520) at java.security.AccessController.doPrivileged(Native Method) at javax.media.j3d.VirtualUniverse.<clinit>(VirtualUniverse.java:516) at AppearanceTest.<init>(AppearanceTest.java:290) D) OpenGL 1.1? from README.Java3D-jdk.OpenGL.txt, I learnt that it needed a OpenGL 1.1, I downloaded it and extracted the materials, but don't know where should I please them (the .dll, .h and .lib) x x x x x x x So I want to ask: 1) in fact, should I include the CLASSPATH of the J3D packages? 2) where should I place the OpenGL stuff? Thx very very much! =========================================================================== 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".