Hi Sabuj, The Surfnet surfaces are handled in Chimera as VRML (Virtual Reality Markup Language) models. The shininess control does not work on VRML models. Also session saving does not save VRML models so they need to be recreated each time you use Chimera. We have been using VRML models in Chimera less and less because they do not support some basic capabilities as you have found. We have another type of surface model used for displaying volumetric data (isosurfaces). To fix the lack of shininess control for Surfnet surfaces, we probably should make Surfnet use the other type of surface model instead of VRML. That will require us to write some new code. Even with that change you still won't be able to save the surfnet surface -- it will still need to be recomputed. Tom