[Opensg-users] rendering performance and optimization

[Enrico Borrione]

Hi Dirk and all opensg users,   I have a small question about performance of rendering and possible ways of optimizing my code. In my scene there are several hundred textured boxes, the most of them using the same SimpleTextureMaterial. I added to all the materials in the scene an SHLChunk, holding a small shader featuring shadow mapping.   In the moment I turn on shadows, performances of the application drop significantly (from kinda 40 fps to a mere 5-6). If the boxes are hidden by a flat panel, the application does not improve it’s speed, so I guess that OpenSG isn’t doing any occlusion culling. Is there a way to turn on occlusions and avoid the shading of invisible pixels? Using a simpletexturedmaterial instead of a MateriaChunk, can end up in some weird OpenGL state swapping and in a resulting lost of performance??? Is there a way to check what part of my application is working as a bottleneck?   Thanks for the help, Enrico   (ps. New mail address old problems ^_^)