Filtering Multi-Layer Shadow Maps for Accurate Soft Shadows
| Autor: | Quirin Meyer, Marc Stamminger, Kai Selgrad, Carsten Dachsbacher |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
business.industry
Computer science Shadow volume ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Filter (signal processing) Computer Graphics and Computer-Aided Design Rendering (computer graphics) Shadow Computer vision Shading Artificial intelligence Texel Shadow mapping business Multi layer ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | Computer Graphics Forum. 34:205-215 |
| ISSN: | 0167-7055 |
| DOI: | 10.1111/cgf.12506 |
| Popis: | In this paper, we introduce a novel technique for pre-filtering multi-layer shadow maps. The occluders in the scene are stored as variable-length lists of fragments for each texel. We show how this representation can be filtered by progressively merging these lists. In contrast to previous pre-filtering techniques, our method better captures the distribution of depth values, resulting in a much higher shadow quality for overlapping occluders and occluders with different depths. The pre-filtered maps are generated and evaluated directly on the GPU, and provide efficient queries for shadow tests with arbitrary filter sizes. Accurate soft shadows are rendered in real-time even for complex scenes and difficult setups. Our results demonstrate that our pre-filtered maps are general and particularly scalable. |
| Databáze: | OpenAIRE |
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