Tutorial: Advanced Lighting and Caustics with Mental Ray and Maya
From CG Tuts+:
"In this tutorial you will learn how to use the 3 indirect lighting systems in Maya (Global Illumination, Final Gathering, and Irradiance Particles) and caustics. You will learn how to solve common problems and reduce rendering times while creating hi-quality images. At the end of this tutorial, you will have gained enough experience to decide which of the 3 indirect lighting systems is the most convenient for any situation."
good caustics maya tutorial
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