today i decided to get on halo 1 for my pc. i started up the campaign and began playing. i then noticed that the plasma rifle wasnt leaving behind any glowing thing after i shot with it. The assault rifle wasnt leaving behind bullet holes. There was no blood ( worst of them all). and whenever i threw a grenade a light right next to the nade would just come and id here a bang and grunts would die and stuff but there was no explosion. I checked my video options 100 times and made sure everything was on. It was working fine yesterday. Can anyone help me out?