Dear Jason,

I have two GeForce GTS 450.  They're not sli.  The driver is pretty new.

The gap glitch has miraculously gone away...I do not know why.  Also I didn't mention that the rendering from from a 1.3 session file, but I don't think that matters?

The "set cylinder_shader_ff_workaround, on" does put things in the right perspective though.

cylinder_shader_ff_workaround, off
cylinder_shader_ff_workaround, on

Best,
Quyen

Below is a snippet of the glxinfo.

================
[quyen@ribo Crystals]$ vglrun glxinfo
name of display: :1.0
display: :1  screen: 0
direct rendering: Yes
server glx vendor string: VirtualGL
server glx version string: 1.4
server glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
    GLX_EXT_visual_rating, GLX_SGI_make_current_read, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SUN_get_transparent_index, GLX_ARB_create_context
client glx vendor string: VirtualGL
client glx version string: 1.4
client glx extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
    GLX_EXT_visual_rating, GLX_SGI_make_current_read, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SUN_get_transparent_index, GLX_ARB_create_context
GLX version: 1.4
GLX extensions:
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
    GLX_EXT_visual_rating, GLX_SGI_make_current_read, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SUN_get_transparent_index, GLX_ARB_create_context
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTS 450/PCI/SSE2
OpenGL version string: 4.1.0 NVIDIA 280.13
OpenGL shading language version string: 4.10 NVIDIA via Cg compiler
=================

On Wed, Feb 22, 2012 at 12:30 PM, Jason Vertrees <jason.vertrees@schrodinger.com> wrote:
Hi Quyen,

What kind of video card are you using? Based on the rendering I'm
guessing Quadro or Intel Mobile.

If Quadro try,

set cylinder_shader_ff_workaround, on

There is a known bug in some Quadro cards which this setting fixes.

Cheers,

-- Jason

On Wed, Feb 22, 2012 at 1:03 PM, QT <rdirective@gmail.com> wrote:
> Dear all,
>
> Is there a way to use the shaders without the unsightly gaps in the models?
>
> Shaders on
> Shaders off
>
> Best,
> Quyen
>
>
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Jason Vertrees, PhD
PyMOL Product Manager
Schrödinger, LLC

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