XRally Tileset especification:

XRally supports custom made tilesets. You can create a tileset and place it
under a subdirectory of the images dir. Each sprite in the tileset has to be
a xpm and must have the followings filenames:

All the tiles must have the same size and must be square ones. But there
isn't any limits on the tile of the size. (I like 48x48 ones... take a look
at the file README.pre2 to see how this size stuff works)

Normal wall     ->  block.xpm

Normal floor    ->  road.xpm

Player car      ->  blue_carUP.xpm        (These can have transparency
                    blue_carDOWN.xpm       effects. Each name represents the
                    blue_carLEFT.xpm       direction where the car is facing)
                    blue_carRIGHT.xpm

Enemy car       ->  red_carUP.xpm
                    red_carDOWN.xpm       (Just as the player car)
                    red_carLEFT.xpm
                    red_carRIGHT.xpm

Flag            ->  flag.xpm              (can have transparency)

Smoke           ->  smoke.xpm             (can have transparency)

Crash           ->  crash.xpm             (can have transparency. Is the image
                                           that appears when you are got by the
                                           ememy)

Outside of      ->  out.xpm
the map

Pit             ->  pit.xpm               (Oil on the road, rocks, roadblock, etc)
												
Custom images   -> block2.xpm		  (Same effect of block.xpm
		   block3.xpm              See the file "levels" for details)
		   block4.xpm
		   block5.xpm
		   block6.xpm

		   road2.xpm              (Same effect of road.xpm
		   road3.xpm               See the file "levels" for details)
		   road4.xpm
		   road5.xpm
		   road6.xpm


For examples, you can see the ones in the "images/default" subdirectory. To
use them, you have to edit the tileset section of the level file.

