Whenever I put fog in my mission it starts out the same as it usualy does, but then within a min or so the old fog starts to vanish and then this performance eating volumetric fog tries to replace it. i was wondering is there any way i can get rid of the new volumetric fog and just keep the old one. i usualy put fog in my missions to enhance the atmosphere while at the same time help with performance so this is a real prob with me.