Installation
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Copy Max-Fast-GI.ms into any directory, for example C:\3dsmax6\scripts.
In 3D Studio MAX, choose MAXScript, Run Script..., and select Max-Fast-GI.ms.
Or once you've closed it, run it again. It will automatically read your scene and detect all object settings.
Copy ts-mray.rps into any directory, for example C:\3dsmax6\renderpresets.
In 3D Studio MAX, choose render setting..., and select ts-mray.rps.
Alternatively, create a shortcut for it if you plan to use it a lot.
This script generates a Light Setup with render setting enable. The settings let you create a Skylight in a faster way that simulates environment light.

There is a separate version for MAX 6, due to interface lay-out changes in this version of MAX.