To use this feature you must install Java3D. We strongly encourage you to do so because of the very nice insights that can be gained from this feature.
Java3D is provided by Sun Microsystems and integrates into your
existing installation of java.
For window and linux computers please visit:
http://java.sun.com/products/java-media/3D/downloads/index.html
For apple computers please visit:
http://www.apple.com/downloads/macosx/apple/java3dandjavaadvancedimagingupdate.html
On our linux workstations this process installed seven files
into our JRE installation as follows:
~/java/j2sdk1.4.2_06/jre/lib/ext/i386/libJ3D.so
~/java/j2sdk1.4.2_06/jre/lib/ext/i386/libj3daudio.so
~/java/j2sdk1.4.2_06/jre/lib/ext/i386/libJ3DUtils.so
~/java/j2sdk1.4.2_06/jre/lib/ext/vecmath.jar
~/java/j2sdk1.4.2_06/jre/lib/ext/j3dcore.jar
~/java/j2sdk1.4.2_06/jre/lib/ext/j3daudio.jar
~/java/j2sdk1.4.2_06/jre/lib/ext/j3dutils.jar
The jar files will apply as is in a windows environment, but
the .so files will be .dll in windows.
Besides following the installation directions, nothing more is needed to use it in AceTree.