A. U. Akenine-möller, A geometry-based soft shadow volume algorithm using graphics hardware, Proceedings of SIGGRAPH 2003, pp.511-520, 2003.

C. P. Chr02, Using Ambient Occlusion to increase the realism of soft shadows Note 35: Ambient occlusion, image-based illumination, and global illumination, PhotoRealistic RenderMan Application Notes, 2002.

]. Chr03 and . H. Christensen-p, Global illumination and all that, Siggraph 2003 course 9: Renderman, Theory and Practice, pp.31-72, 2003.

H. Lapierre-m and H. N. Sillion-f, A survey of real-time soft shadows algorithms, Computer Graphics Forum, vol.22, issue.4, pp.753-774, 2003.

]. Lan02 and . Landis-h, Production ready global illumination, Siggraph, pp.87-101, 2002.

P. M. Green-s, Ambient occlusion, pp.279-292, 2004.

. Zhou-k, L. S. Hu-y, . Guo-b, and . Shum-h.-y, Precomputed shadow fields for dynamic scenes, ACM Transactions on Graphics, vol.24, issue.3, 2005.

Z. S. and I. A. Kronin-g, An ambient light illumination model, Rendering Techniques '98 (Proceedings of the 9th EG Workshop on Rendering), pp.45-56, 1998.

.. Two-buffers-blending, 11 5.3 Accounting for illumination from an environment map, p.13

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