After Effects CS4 Light and Shadow & Creative Cow
Watching this tutorial has helped me figure out a way to cast a shadow for my film’s visual fx. I could easily download a figure of a person’s body or have a bizarre looking shape on the footage and cast a shadow. This will be done by going into After Effects and going on Layer = New = Light = Spot Light and allowed the figure layer to cast shadow. Might or might not add other lights depending on how it will affect the footage.
This link in plain text instructs how to cast shadows.