[Unity3D 3.5.6f4] Get rid of shadow projector artefact

Here is a quick scene i made so you can see the artifact i got using projectors:
//Sorry scene deleted, see the answer below if you got weird stripes with projectors

Sorry i didn’t tweak the physics.

There are 5 projectors that follows the “car”, one for each wheels and one for the structure. But there are dark stripes laying on the ground form the wheels, you notice it when you move the car.

You have to deactivate “Generate Mip-Maps” in the inspector for both Fall-off texture and light or shadow texture