Peter EngelHardt replies about solid rendering crash on Mac. ------- Start of forwarded message ------- Date: Thu, 9 Nov 2006 22:42:41 +0300 To: Thomas Goddard <goddard@cgl.ucsf.edu> From: Peter Engelhardt <engelhar@medi.mappi.helsinki.fi> Subject: Re: [Chimera-users] Fwd: Chimera crashes with MacPro show solid Dear Tom, Thanks, I did what you told and it all worked out very fine Though a bit buggy - volumes disappear and appear suddenly - but under certain control anyhow. Cheers and thanks again Peter

The crash with solid rendering is almost surely a graphics driver bug. The solid rendering code works correctly on many different graphics cards and there is nothing in that code that works differently for stereo rendering.

Does the crash occur for solid rendering without stereo?

yes instantly

Does the size of the data set matter?

not tested

There are two solid rendering options that may avoid this crash. These are shown in the volume dialog using the Features / Solid Rendering Options menu entry. From the back trace you sent I see the crash occurs when pushing the data to the graphics card and mapping the colors using a colormap. If you turn off the option "Use colormap of size X for solids" then different code will be used -- colors will be computed on the CPU instead of on the graphics card. A second change that may avoid the crash is turning off "Solids using 2D textures". This makes Chimera use 3 dimensional textures instead of 2 dimensional textures.

Tom

- -- ___________________________________________________________ Peter Engelhardt, PhD, docent Assistant Professor in Molecular Genetics Unit of Molecular Electron Tomography Department of Pathology and Virology Haartman Institute P.O.Box 21, FI-00014 Univ. of Helsinki, Finland Visiting Address: Haartmaninkatu 3, Helsinki ------- End of forwarded message -------