I made a crowed with 10 persons with particular. They are coming towards the camera. Now I tried to give them some shadows on the ground. I failed. With "shadow" it is not possible cause I can't rotate properly. Anyone some suggestions ?
That may be difficult. The smart thing would be to create the shadow in the pre-comp along with your keyed people and then simply have it integrated in the custom particle already. If done properly, it will even look like the people are casting shadows on each other.