Realistic, Real-Time Shading

Jan Kautz

(University College London)

The creation of images that are indistinguishable from photographs is a long-standing problem in computer graphics. Current methods can take minutes or even hours to produce a single realistic image. Yet, there are many applications, such as architectural walkthroughs and flight-simulators, for which real-time image synthesis is necessary. Existing solutions sacrifice image quality in order to meet time constraints; for instance, by using only point lights that cast hard and unrealistic shadows or by completely ignoring indirect illumination. I will present techniques that address these problems. First, I will introduce Convolution Shadow Maps, which enable the use of natural lighting to cast realistic, soft shadows. Second, I will present Imperfect Shadow Maps as well as Microrendering, novel rendering techniques that add realistic indirect illumination, including color bleeding and indirect shadows. Both techniques are very efficient and support fully dynamic scenes as no precomputation is required.
Tuesday 2nd November 2010, 14:00
Robert Recorde Room
Department of Computer Science