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ESLPV: enhanced subsurface light propagation volumes

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Abstract

In this paper, we present an enhanced subsurface light propagation volumes (ESLPV) method for real-time rendering of translucent materials. Our method is an extension of the subsurface light propagation volumes (SSLPV) (Proceedings of the ACM SIGGRAPH Symposium on High Performance Graphics, HPG ’11, pp 7–14 ACM 2011) technique. We improve the SSLPV by incorporating a single-scattering framework that uses the same spherical harmonics (SH) storage structure as the SSLPV. The new single-scattering technique deposits radiance as SH coefficients during a ray marching procedure. The final result is rendered using a ray tracer with importance sampling along the camera ray. This framework also enables the ESLPV to render refractive objects. In addition, we also propose a distance transform optimization that can remove the unnecessary computations during the propagation cycle of LPV (Proceedings of the 2010 ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games, I3D ’10, pp 99–107 ACM 2010) based methods. A hierarchical propagation process is also proposed to render highly translucent materials. Similar to the SSLPV, our ESLPV method contains no precomputations, and has low storage requirements that are independent of the mesh size.

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Acknowledgments

We thank all reviewers for their comments and Stanford Computer Graphics Laboratory for their 3D models. Henry Johan is supported by Fraunhofer IDM@ NTU, which is funded by the National Research Foundation (NRF) and managed through the multi-agency Interactive and Digital Media Programme Office (IDMPO) hosted by Media Development Authority of Singapore (MDA).

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Authors and Affiliations

  1. Nanyang Technological University, Singapore, Singapore

    Ming Di Koa

  2. Fraunhofer IDM@NTU, Singapore, Singapore

    Henry Johan

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  1. Ming Di Koa
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Correspondence to Ming Di Koa.

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Koa, M.D., Johan, H. ESLPV: enhanced subsurface light propagation volumes. Vis Comput 30, 821–831 (2014). https://doi.org/10.1007/s00371-014-0952-3

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