For one sequence in the movie Epic, we created the illusion of millions of dust particles suspended in mid-air, which represented a scene from earlier in the film. This presented four major challenges. First, the hologram had to represent a scene filled with characters and plant life, so we would have to sample surface and shading data from render time procedural geometry. Second, it needed to exist in the form of millions of dust particles which interacted with the motion of a character who walks through the hologram. Third, because Epic is a stereoscopic movie, the hologram had to fill interior regions of our character and set models that are modeled as empty space. Finally, we needed to render and composite these particles in a way that captured the detail of a characters face, and reinforce the scale of the Leafmen world.