@Synchrotron
That's possibly and issue as well. Low settings, less everything but players are rendered when no foilage or other things they're possibly hiding behind are rendered?
Many multiplayer players run their settings on the lowest possible settings for 2 reasons, more FPS, and less stuff is rendered for player cover, fog, trees, bushes, etc.
Something else needs to be done to resolve this and that may be why it is the way it is. If you have a decent rig you shouldn't be running Very Low just to get 500fps and have less foliage/fog/etc. rendered.