I was looking at ( not using a Matrix 
) the amazing applets uploaded by some very talented guys
in the Java4k site. Fantastic works ,imho , particularly this one : Die Z by Alan Waddington.
http://www.java4k.com/index.php?action=games&method=view&gid=444
Reading the code and understand what’s going on unfortunately is beyond my skills.
Any tip about some 3d pure java tutorial?
The ones i have found around are only 2D.
Thanks !