Hi Lorenzo, >From your description it's sounds like either objects aren't pre-compiled or that they have been pre-compiled but not yet downloaded by the GPU.
In OpenGL there is no way to formally force a GL object to be download to the GPU, it's up to the drive to decide what it does when. You can however leverage the fact that texture and vertex buffer objects will be made resident on the GPU by rendering them and as long as there is enough memory to keep them around they'll be left resident by the driver for when you actually need them. The osgUtil::GLObjectsVisitor just does compilation it doesn't do any dummy rendering to force the download to the GPU. The osgUtil::IncrementalCompileOperation does has an option for rendering an dummy geometry to force the download of textures, but this is not on by default, and only used during incremental compilation - i.e. when using a paged database. One possible route you could take would be to subclass from GLObjectVisitor and add in a geometry in a similar way to what the IncrementalCompileOpeation does and invoke this via a custom RealizeOperation (see the osgvolume example to see how RealizeOperation can be used.) You'd need to make sure that your scene graph is assigned to the viewer before the windows are realized though, When rendering a force download dymmy geometry you'd want to do it in a way the geometry rendering doesn't affect the framebuffer, either by doing prior to a clear of the graphics window or by ensuring all geometry is out of the view frustum or discarding the fragments. Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org