A. , Y. Vasilyev, Y. Ben-shahar, O. And-zickler, and T. , Toward a theory of shape from specular flow, ICCV07, pp.1-8, 2007.

N. , M. And-d-¨-ollner, and J. , Blueprints: illustrating 510 architecture and technical parts using hardware-accelerated non- 511 photorealistic rendering, Graphics Interface Cana- 512 dian Human-Computer Communications Society, pp.49-56, 2004.

O. , Y. Belyaev, A. And-seidel, and H. , Ridge- 514 valley lines on meshes via implicit surface fitting, p.515, 2004.

O. , J. P. Banks, M. S. And-agrawala, and M. , The 517 assumed light direction for perceiving shape from shading, p.518, 2008.

P. , M. And, and S. Green, GPU Gems, 2004.

R. , S. Burns, M. And-decarlo, and D. , Ex- 529 aggerated Shading for Depicting Shape and Detail, Proc. SIGGRAPH, pp.1199-1205, 2006.

T. Saito and T. And-takahashi, Comprehensible Ren- 532 dering of 3-D Shapes, Proc. ACM SIGGRAPH '90, pp.533-197, 1990.

S. , P. J. Martin, W. Gooch, A. And-gooch, and B. , The lit sphere: A model for capturing NPR shading from 536 art, Graphics interface, pp.143-150, 2001.

V. , R. Pacanowski, R. Barla, P. Granier, X. et al., Light warping for enhanced surface depic- 547 tion, ACM Transaction on Graphics (Proceedings of SIGGRAPH, vol.548, p.2009, 2009.

Z. , L. He, Y. Xie, X. And, C. et al., Laplacian 550, 2009.