bad graphics

i can see the graphics being drawn, this happens on every release of PCM, i can't understand it.
i'm looking at the riders, and right in front of my first rider i can see the graphics (just some, like shadows, highlights) being drawn, this is really really bad, and hurts real bad the gameplay.
how do i fix this? what option is making this?
i'm looking at the riders, and right in front of my first rider i can see the graphics (just some, like shadows, highlights) being drawn, this is really really bad, and hurts real bad the gameplay.
how do i fix this? what option is making this?