Excited to explore forward-thinking approaches to the most quickly changing mode of computing, Perception began work designing the interface for the Stark PDA. They felt it was important to balance the complexity and sophistication of an interface that felt futuristic with elements that felt familiar and phone-like. The team worked with Director Jon Favreau and VFX Supervisor Janek Sirrs in striking that balance and were grateful for their insight and impressive attention to detail. Perception also needed to create an interface that would function properly within the context of the already shot footage of Robert Downey Jr improvising gestural inputs with a blank phone (they found themselves designing several circular navigation devices to match his "dialing" gestures).As with the table, Perception presented flat designs of the interfaces, as well as shots with the interface temporarily composited: