VRay sun

V-Ray V-Ray for 3ds Max General
1

How should I go about setting up a VRay sun which will reflect the suns location for a specific location on the planet, year, time of year and day?

Thanks

2

Hi,

you could set up a 3dsmax Sunlight and then align the vraysun to it.

Haven’t tested that yet, but I see no reason why this shouldn’t work.

Best regards,

Dieter

3

also, link the vraysun to the max sunlightsystem, that way you can alter the sun specs later and your vraysun moves with it.

4

Thanks for the replies.

This bring me to the next questions, how accurate is the sun data in MAX.

For example in the scene I am busy with I took photos on site and set the time and place in MAX to this. The base of my model is on Z 0, however the MAX sun is below the zero Z height. Which is not true to the data from the photos.

Any options to improve the accuracy with in MAX or am I missing some settings?

5

well, do you know the exact z values of the site?:wink: also can it depend of daylightsavingstime etc.
I would say, adjust the sun a bit to match your photo’s. You can move the compas up/down/etc and if you linked everything the rest will follow..

6

I have a pretty close estimation of the site’s height above sea level (10m above sea level) Which was even more strange to me that the sun in lover than the zero Z height.

When placing the VRay sun, to which object should I align its target?

Thanks

7

i was just looking at this yesterday. this little tutorial looks like a good way to do the day light with vray.