Filtering Multi‐Layer Shadow Maps for Accurate Soft Shadows

Selgrad, Kai; Dachsbacher, Carsten; Meyer, Quirin; Stamminger, Marc

doi:10.1111/cgf.12506

Cited by 11 publications

(14 citation statements)

References 26 publications

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“…Filtering The previously computed fragment lists are then filtered and merged via a filtering scheme by mip-mapping and stackfiltering the lists similarly to Selgrad et al [2014]. During the filtering step (Section 5) silhouette edges, i.e.…”

Section: Algorithm Overviewmentioning

confidence: 99%

“…The data structure described thus far is very general; its applicability to soft shadows is described in Selgrad et al [2014]. In this section, we describe how this data structure can be used to implement a feature-rich, real-time depth of field effect.…”

Section: Accumulationmentioning

confidence: 99%

“…As a result, we obtain a sequence of multi-layer images, filtered by increasing filter sizes. In recent work [Selgrad et al 2014], we presented the same data structure, yet for quickly computing soft shadows.…”

Section: Introductionmentioning

confidence: 99%

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Real-time depth of field using multi-layer filtering

Selgrad

Reintges

Penk

et al. 2015

Proceedings of the 19th Symposium on Interactive 3D Graphics and Games

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Figure 1: Our novel approach to rendering depth of field in real-time provides pleasant and plausible results (left), also for complicated cases where out-of-focus geometry in the near-field would occlude important scene geometry (right). AbstractWe present a novel technique for rendering depth of field that addresses difficult overlap cases, such as close, but out-of-focus, geometry in the near-field. Such scene configurations are not managed well by state-of-the-art post-processing approaches since essential information is missing due to occlusion.Our proposed algorithm renders the scene from a single camera position and computes a layered image using a single pass by constructing per-pixel lists. These lists can be filtered progressively to generate differently blurred representations of the scene. We show how this structure can be exploited to generate depth of field in real-time, even in complicated scene constellations.

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Section: Algorithm Overviewmentioning

confidence: 99%

Section: Accumulationmentioning

confidence: 99%

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Real-time depth of field using multi-layer filtering

Selgrad

Reintges

Penk

et al. 2015

Proceedings of the 19th Symposium on Interactive 3D Graphics and Games

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“…Y-maps [21] promise to offer the best of both worlds. They consist of one (or more) mip map steps, followed by a full N-Buffer chain.…”

Section: Mip Maps N-buffers and Y-mapsmentioning

confidence: 99%

Adaptively layered statistical volumetric obscurance

Hendrickx

Scandolo

Eisemann

et al. 2015

Proceedings of the 7th Conference on High-Performance Graphics

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We accelerate volumetric obscurance, a variant of ambient occlusion, and solve undersampling artifacts, such as banding, noise or blurring, that screen-space techniques traditionally suffer from. We make use of an efficient statistical model to evaluate the occlusion factor in screen-space using a single sample. Overestimations and halos are reduced by an adaptive layering of the visible geometry. Bias at tilted surfaces is avoided by projecting and evaluating the volumetric obscurance in tangent space of each surface point. We compare our approach to several traditional screen-space volumetric obscurance techniques and show its competitive qualitative and quantitative performance. Our algorithm maps well to graphics hardware, does not require the traditional bilateral blur step of previous approaches, and avoids typical screen-space related artifacts such as temporal instability due to undersampling.iii PREFACE

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“…Mora et al [27] propose a lazy way to reduce the computation, but there also exist some defects like the limitation on geometric resolution. Selgrad et al [28] introduce a method that capture the distribution of depth values by pre-filtering multi-layer shadow maps, thus resulting in a much higher shadow quality for overlapping occluders with different depth.…”

Section: Related Workmentioning

confidence: 99%

Generate Accurate Soft Shadows Using Complete Occluder Buffer

Cai

et al. 2015

2015 14th International Conference on Computer-Aided Design and Computer Graphics (CAD/Graphics)

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In this paper, we propose a novel approach to generate accurate soft shadows for complex virtual scenes in real time. A Multi-Layer Occluder buffer (MLO-buffer) is used in our algorithm, and it is determined by rendering the scene from the center of area light source. MLO-buffer records all the potential occluders in the scene. When calculating shadow factors, area light source is represented by a set of point samples, and MLO-buffer is traversed to figure out the visibility relations between an occludee and each light sample. Finally, the accurate soft shadows can be produced. The experimental results show that our algorithm can generate high-quality soft shadows in real time without making any assumption, like shape orientation or density distribution, on the area light source.

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Filtering Multi‐Layer Shadow Maps for Accurate Soft Shadows

Cited by 11 publications

References 26 publications

Real-time depth of field using multi-layer filtering

Real-time depth of field using multi-layer filtering

Adaptively layered statistical volumetric obscurance

Generate Accurate Soft Shadows Using Complete Occluder Buffer

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