<HTML> <HEAD> <TITLE>Re: [gate-users] how to get a transparent voxelized phantom?</TITLE> </HEAD> <BODY> Hi Yuxuan, In order to view transparency, you need a viewer that supports it, like the G4RayTracer (for more info see  ... geant4/source/visualization/RayTracer/README).  The alpha parameter controls the transparency level: 0-transparent, 1-opaque. Cheers, Richard On 8/23/05 10:26 AM, "yuxuan.zhang@di.mdacc.tmc.edu" <yuxuan.zhang@di.mdacc.tmc.edu> wrote: <BLOCKQUOTE><TT> Hi, In the manual for Gate v2.1-2.2, the figure 7.1 shows the ability of displaying a transparent phantom. But in the context there are no detailed descriptions about how to do it. Is there anyone know something about that? Also, in the chapter 7.3.2, there's a parameter about the color attribute -- alpha. What does this parameter controls? I've changed the value between 0 and 1, seems there are no differences. Does it related to some other setup of the graphics display software or driver, like OPEN GL, or Geant4? I am using MesaGL-6.2 now. Yuxuan </TT></BLOCKQUOTE><TT> </TT> -- Richard Taschereau, Ph.D. CRUMP Institute for Molecular Imaging University of California Los Angeles 700 Westwood Plaza A438 Los Angeles, CA 90095-1770 Phone: (310) 794-1839 Fax:     (310) 206-8975 email: RTaschereau@mednet.ucla.edu </BODY> </HTML>