All, I just thought I'd share this slight improvement to the code to help with debugging why GPU rendering fails. Maybe this can get into the source?
In ParaView3/VTK/VolumeRendering/vtkOpenGLGPUVolumeRayCastMapper.cxx vtkOpenGLGPUVolumeRayCastMapper::PreRender, I've added extra code to handle an unsupported driver and report it to the user. // If we can't load the necessary extensions, provide // feedback on why it failed. if(!this->LoadExtensionsSucceeded) { const char *gl_vendor=reinterpret_cast<const char *>(glGetString(GL_VENDOR)); const char *gl_version=reinterpret_cast<const char *>(glGetString(GL_VERSION)); vtkErrorMacro( "Rendering failed because the following OpenGL extensions " "are required but not supported: " << (this->UnsupportedRequiredExtensions->Stream.str()).c_str() << "\n or the " << gl_vendor << " " << gl_version << " OpenGL implementation is not supported for GPU rendering" ); return; } In 3.9.0 an error was reported about extensions but it did not indicate what OpenGL driver it found (e.g. Mesa and ATI libraries are not handled). The new error output looks like the following: ERROR: In /scratch/pmcintos/ParaView3/VTK/VolumeRendering/vtkOpenGLGPUVolumeRayCastMap per.cxx, line 4207 vtkOpenGLGPUVolumeRayCastMapper (0x18a06460): Rendering failed because the following OpenGL extensions are required but not supported: or the Mesa Project 1.4 (2.1 Mesa 7.6.1) OpenGL implementation is not supported for GPU rendering Hope this helps someone :) Cheers, Paul --- www.internetscooter.com _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview