Vray Sun and Vray Physical Camera works hand-in-hand to give you an accurate physical simulation for your rendering composition base on sun location and real camera parameters. In here Neil Cristobal a.k.a. 'Bokkins' shared us a simplified and easy step procedures of the  workflow.

Hello. I've prepared a simple tutorial on vray sun and vray cam. Just follow these simple set-up and in no time, vray sun and vray cam will be your weapon of choice. Good luck and happy rendering!

Sample File: Max 9 + vray 1.5SP1

link 1 - 3d Allusions

link 2 - Free file hosting by Savefile.com

link 3 - RapidShare Webhosting + Webspace

VraySun position will greatly affect the mood of the scene. It can simulate day and night.

High noon - most used environment

Late afternoon or early morning - used to create mood

Night - more mood

Midnight - against a pitch black sky

Also, make sure that you adjust the ENVIRONMENT under the RENDER menu (F10)

For morning setup

For night setup

Hope it helps!!!

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