Wolfram, This could (at least in theory) be a bug in PyMOL, but I suspect it is a problem with either Mesa or the OpenGL drivers on your system. Seeing the backside of triangles look like the front is an indication that either PyMOL or the graphics driver is scrambling the order of vertices or inverting surface normals.
For the time being, you might try "set two_sided_lighting" Cheers, Warren PS. For future reference: Whenever someone posts a bug/problem report to the list involving graphics glitches, please include the maker of the graphics card and the name/version of the OpenGL driver you are using. PyMOL normally outputs this information to the console (but not the text window) on startup. -- Warren L. DeLano, Ph.D. Principal Scientist . DeLano Scientific LLC . 400 Oyster Point Blvd., Suite 213 . South San Francisco, CA 94080 . Biz:(650)-872-0942 Tech:(650)-872-0834 . Fax:(650)-872-0273 Cell:(650)-346-1154 . mailto:war...@delsci.com > -----Original Message----- > From: pymol-users-ad...@lists.sourceforge.net > [mailto:pymol-users-ad...@lists.sourceforge.net] On Behalf Of > tem...@sgx3.bmb.uga.edu > Sent: Monday, December 06, 2004 12:03 PM > To: pymol-users@lists.sourceforge.net > Subject: [PyMOL] fedora core 3 and pymol > > Colleagues, I noticed the following problem on fedora core 3 > boxes (i386 and x86_64), using either pymol 0.96 or 0.97 > (precompiled linux tar ball): > The cartoon representation of PDB entry 1NXC (approx. 400 > residues, mainly > helical) appears normal for about half of the structure > whereas the other half can be seen as shadows covering the > "normal" part of the structure depending on the model's > orientation. Upon rotation, the "normal" half remains with > the same part of the structure. That means, in a certain > orientation the "normal" half covers the "shadow" half. In > another orientation, the "shadow" half would cover the > "normal" half and in yet another, the left side of the model > disappears in the background whereas the right side appears normal. > A smaller molecule appears to behave "normally". > pymol 0.97 works as expected on Redhat 9.0 and I *believe* I > did not experience the problem on Fedora Core 2 (x86_64). > For X, I am using the radeon driver supplied with Core 3. > I strongly believe that the problem was introduced by my > Fedora core upgrade, but I have no idea what ultimately > causes the phenomenon. > Has anyone else any comments? > Regards, > Wolfram Tempel > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide Read honest & > candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://productguide.itmanagersjournal.com/ > _______________________________________________ > PyMOL-users mailing list > PyMOL-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pymol-users >
