Soft shadows and penumbra regions generated by extended light sources such as linear and area lights are visual effects that significantly contribute to the realism of a scene. In interactive applications, shadow computations are mostly performed by either the shadow volume or the shadow map algorithm. Variants of these methods for soft shadows exist, but they require a significant number of samples on the light source, thereby dramatically increasing rendering times. In this paper we present a modification to the shadow map algorithm that allows us to render soft shadows for linear light sources of a high visual fidelity with a very small number of light source samples. This algorithm is well suited for both software and hardware rendering.
CITATION STYLE
Heidrich, W., Brabec, S., & Seidel, H.-P. (2000). Soft Shadow Maps for Linear Lights (pp. 269–280). https://doi.org/10.1007/978-3-7091-6303-0_24
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