I can not adjust materials to make them look dull in rendering. Using Adjust Material Definition, to say in properties-options-shininess i set it to DULL, it is still reflective and shiny on the rendering. Toggle reflection doesn't change anything. I noticed that materials which do not have checked by default any of shininess options, are showing dull in rendering, but i can not uncheck if one of the definition is already checked and changing them to shiny or matte or dull still keep them being reflective in rendering. It looks pretty odd, like, shiny glossy reflective wood or travertine. WHat do I do wrong?? Last update is downloaded.