   tank tracks
  Anybody know how to make tank tracks that appear in the ground for a game?  For example there is a tank game for Wii Play where tracks are laid where ever the tank drives.  I'm not looking for code or a working solution but more for the concept of how it can be done.  I can code it myself.Decals?  Decal baked into the ground texture?  Particles (that just spawn and stay put)?  I imagine it has to be fast and easy on memory due to the fact that its not a gameplay priority to draw tracks.  Just can't get my mind wrapped around how those might be done.Thanks!Steve   
  Shawn Hargreaves has a blog post where he talks about how they did skid marks for MotoGP. It's pretty simple and cheap, if that's what you're going for. If you want something fancier and you can go for a technique that uses vertex textures.   