Accurate and Efficient Rendering of Detail
using Directional Distance Maps

Ravish Mehra     Subodh Kumar
IIT Delhi

Abstract

We present an efficient GPU technique for rendering rich geometric detail (e.g., surface mesostructure) of complex surfaces. We use sphere-tracing aided by directional distance maps (DDMs) to quickly find ray-mesostructure intersection. High accuracy is achieved by analytically detecting such intersections, and space requirement is significantly reduced by distance map compression. Our technique can handle complex scenes containing both height-field and non height-field mesostructures in real time, with correct self-occlusion, self-shadow, interpenetrations and silhouettes. We demonstrate our algorithm on a variety of test scenarios and compare it with previous techniques.

Ravish Mehra and Subodh Kumar. Accurate and Efficient Rendering of Detail
using Directional Distance Maps

Preprint (PDF, 8.1 MB),

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