Binary package “radiance-sse3” in ubuntu trusty
Lighting Simulation and Rendering System - SSE3 optimizations
Radiance is intended to aid lighting designers and architects by
predicting the light levels and appearance of a space prior to
construction.
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This package contains SSE3-optimized versions of the renderers. To be able
to use them your processor needs to support the SSE3 instruction set.
Using optimized binaries speeds up rendering by 5-15%.