Second-order feed-forward renderingfor specular and glossy reflections

Lili Wang, Naiwen Xie, Wei Ke, Voicu Popescu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The feed-forward pipeline based on projection followed by rasterization handles the rays that leave the eye efficiently: these first-order rays are modeled with a simple camera that projects geometry to screen. Second-order rays however, as, for example, those resulting from specular reflections, are challenging for the feed-forward approach. We propose an extension of the feed-forward pipeline to handle second-order rays resulting from specular and glossy reflections. The coherence of second-order rays is leveraged through clustering, the geometry reflected by a cluster is approximated with a depth image, and the color samples captured by the second-order rays of a cluster are computed by intersection with the depth image. We achieve quality specular and glossy reflections at interactive rates in fully dynamic scenes.

Original languageEnglish
Article number6803934
Pages (from-to)1316-1329
Number of pages14
JournalIEEE Transactions on Visualization and Computer Graphics
Issue number9
Publication statusPublished - 1 Sept 2014


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