Hello, I've a little problem the pickClosest method. My universe is composed of four boxes (size = 1,1,1) on the x-z plan. Each of these boxes is shifted in one of the for standard direction (+x, -x, +z, -z). Now I've a pickRay in position (0,0,0) looking in direction (1,0,0). But the pickClosest method applied with this pickRay always return a scene graph which value is null. Can someone give me a little example which help me to understand what I've done wrong ? Thank you for your help claude -- #include <standard.disclaimer> ================================================================ Claude Fuhrer Institut d'informatique Universite de Neuchatel Rue Emile Argand 11 CH-2007 Neuchatel tel (+41) 32 718 27 48 rfc822 : [EMAIL PROTECTED] fax (+41) 32 718 27 01 WWW : http://www-iiia.unine.ch/ ================================================================ ===================================================================== To subscribe/unsubscribe, send mail to [EMAIL PROTECTED] Java 3D Home Page: http://java.sun.com/products/java-media/3D/