Hi Bastian, It's likely to be a driver bug, or perhaps a sensitivity in the driver to the GLSL shaders that are used - sometimes some drivers can be more picky than others. I previously worked with an ATI card under Linux with osgVolume and didn't have problems so perhaps there has been a regression on the driver front.
To investigate further you'll need to see if there are any OpenGL errors reported - have a look on the console to see if the OSG has picked up on any OpenGL errors. Robert. On 17 September 2012 15:27, Bastian Rieck <bastian.ri...@iwr.uni-heidelberg.de> wrote: > Dear list, > > we are currently facing rendering issues when using `RayTracedTechnique` > instead of `FixedFunctionTechnique` for rendering with osgVolume. > > More precisely, we are using a Samsung NP305V5A notebook (with two AMD > graphics cards) running Ubuntu 12.04 and OpenSceneGraph from the > official packages (currently 3.0.1-2). See the attached screenshot for > more details --- it shows the rendering issues that occur when trying to > volume render a standard data set ("engine block"). The block is > rendered normally when using `FixedFunctionTechnique`. > > Did anyone else encounter similar problems (maybe also with AMD graphics > cards)? If so, how could we resolve them? > > We cannot reproduce the issue on our developer workstations (using > Geforce GTX 480). > > We would be happy to add more information about this error but we > currently do not know how to approach it properly. Any help would be > appreciated. > > Kind regards, > Bastian > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org