Mental Ray Importons and Irradiance Particles rendering algorithm, is a novel approach to compute global illumination based on importance sampling, which tends to converge much faster to a desirable quality than the existing solutions like global illumination photon tracing combined with final gathering.
Everybody seems to agree that this Mental Ray rendering algorithm, represent the future of 3d Rendering and is still in the Optimization Phase.
In this tutorial I have explained a few different approach “workflows” to present the user with more choices in terms of light mood and render times output.

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