STRAT

well why use physical sky/sun system? because it give a pleasing daylight style of lighting. you position the sun where you like, and due to it's height and intensity vray knows what shade or hue or density to colour it and light it. yes, you have control over it to a certain degree, but thats the whole point of the sun system - it's angled to simulate real daylight. but try changing the sun colour or hue the light gives then you're limited. what if you dont want a simulated sun and daylight? what if you just want an internal studio lighting? you dont use daylight system.

using a plain old fashioned spot light gives you manual control over all aspects of how it works. you can simulate the daylight system with it, and also radically change it's colours and other aspects that you cant do with the daylight system.

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