Polygon Flags command (Edit-Tools menu)

This command can be used to modify the behavior of a high-resolution track polygon when a car drives over it. It is only available in Polygon mode and when a high-resolution track polygon is selected. T3ED then displays the Polygon Virtual Road Flags dialog box, which lets you modify the following settings:

Flags

• Wall collision detection (virtual road boundary): this option must be checked if the polygon is passable and any of the neighboring track polygons is not passable. Otherwise, NFS3/HS is unable to detect any collision with an invisible wall and the car will be free to move into a neighboring impassable polygon.
• Extra-object collision detection: this option must be checked if the polygon is passable and if any extra-object lies nearby. Otherwise, NFS3/HS is unable to detect any collision with an extra-object and the car will be free to move across trees and other obstacles.
• Disable weather effects (NFS4 only): disables effects such as wet roads in the selected polygons, which is seen in covered-up areas like tunnels.
• Drive-over behavior: Choose an item in the list in order to describe how cars should behave when they pass over the polygon. Values 0 and 14 correspond to impassable polygons, while all others correspond to passable polygons. This list also lets you choose whether grass, snow, dust... should be projected when a car passes.
  • NOTE: If you wish to make passable polygons which previously weren’t passable, it is likely that you will have to adjust the width of the virtual road in order to get rid of the invisible walls restraining the car's movements on either side of the road: for this, use the Adjust Road Width command in the Edit-Tools menu.
• No neighbor flags: indicates if the polygon is besides a wall polygon in order to apply collisions correctly. NFS3 only has no-left and no-right neighbour flags; NFSHS has no-forward and no-backward flags in addition.
  

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