Per-Pixel Displacement Mapping and Distance Maps
نویسنده
چکیده
Based on a standard software ray-tracer with soft shadowing and glossy reflection capabilities, I present a per-pixel displacement mapping algorithm. This algorithm modifies the intersection routine already used for shadows and reflections and so they are preserved. The algorithm relies on a distance map, which along with a normal map for lighting information, can be generated for each point in the displacement map input. The distance map allows efficient calculation of dynamic sampling of the displacement map by an intersecting ray. As perpixel displacement mapping can be implemented in a modern GPU pixel shader, this algorithm has many future possibilities.
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