After some teases, Video Copilot has a new After Effects tutorial video, 108. Particle Shadows, which extends some earlier work to demonstrate how to cast realistic shadows from a 3D Particle System (using Trapcode Particular 2). The tutorial includes work-flow tips and setup for custom sprites, as well as a mini 3D Max demo for creating the "Future Balls." See tutorial 100. Glass Orbs to make the balls pictured left.