Reduced line rendering. Check the box to render every other line of the race screen. Competitors' positions Check the box if you wish to monitor your competitors' track positions. Rolling the car Check the box to have the car roll when cornering. Tunnel texture-mapping Check the box to have texture-mapped tunnels. Track texture-mapping. Check the box to have texture-mapped tracks. Rearview mirror Check the box to include a rear-view mirror in your race screen. Dashboard Check the box to show the dashboard in the cockpit view. Initial viewpoint. Click here to see a pull-down menu of viewpoints for the start of the race. Screen size Click here to see a pull-down menu with a choice of picture sizes.