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Abstract

We present a new hybrid rendering method for interactive
walkthroughs in photometrically complex environments. The display
process starts from some approximation of the scene rendered at high
frame rates using graphics hardware. Additional computation power
is used to correct this rendering towards a high quality ray tracing
solution during the walkthrough. This is achieved by applying
corrective textures to scene objects or entire object groups. These
corrective textures contain a sampled representation of the
differences between the hardware generated and the high quality
solution. By reusing the textures, frame-to-frame coherence is
exploited and explicit reprojections of point samples are avoided.
Finally, we describe our implementation, which can display
interactive walkthroughs of fairly complex scenes including high
quality global illumination features.