Hybrid transparency

Marilena Maule (UFRGS), Rafael Torchelsen (UFFS), Rui Bastos (NVIDIA), João L. D. Comba (UFRGS)
InACM Symposium on Interactive 3D Graphics and Games (I3D), 2013, USA DOI

Hybrid transparency is a novel technique for real-time approximation of order-independent transparency. Our hybrid approach combines an accurate compositing, of a few core transparent layers, with a quick approximation, for the remaining ones. The main advantage is its capability to operate in highly restricted memory without noticeable artifacts. This feature enables its usage with increasing scene complexity and image resolution, which other techniques fail to handle. Hybrid transparency is suitable for high-parallel execution, can be implemented using current GPUs and further improved, with minimal GPU architecture changes. We present quality, memory and performance analyzes and comparisons against the individual techniques, which compose our proposal, the adaptive transparency, and a reference image generated with an exact method. Our results demonstrate that hybrid transparency is able to generate high-quality images with the lowest memory consumption at competitive frame-rates.

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