Pixelstudio.nl

Hello people,

A small tutorial on the basic usage of the vraysun/vraysky and vraycam.
I made this tutorial cause people requested this allot.

Before we start you’ll need to download the starting scene. Download link : start.zip
This scene is very easy to create, just a couple of walls, a door and a window. nothing more just yet.
It also contains a vraysun and a vraycam. (btw i’m using 2.2 gamma).
Also for a more realistic scene you need more objects, cause objects make the light bounch in the scene.
this example is hardly a good example.

When you insert a vraysun in your scene vray will ask you if you want to put a vraysky map in your environment. choose yes!!.

When your render this out you’ll get the following image:

As you see the scene is kinda black, with a sunset in the background.
Well this can be explained:

First of all, there is no GI, so no light is bounching around, that would example the blackness.
Second the sunset is cause by the vraysun (how is explained later)
You think you have it all, well not true. the third thing is the vraycam wich has a big impact on your light (also explained later on).

the first thing you can do is turning on your GI, just use a IRmap and a lightcache. i use very low settings cause i’m just pre-viewing renders.
this resulting image would be something like the image on the right.

The second thing you can adjust is the color of you sun.
The color of the sun is calculated with the angle of the sun and it’s target.
The higher your angle is the more the sun is going towards white light.
You still see a brownish color in the image, this is mainly caused by the floor.
if you want to remove the color bleeding check my other tutorial about that.

The last thing you can do is setting your camera, and this has a big impact on your image.
First a couple important settings wich have impacht on your light:

F-Number : changing this will affect your brightness.
ShutterSpeed : how long the shutter stay’s open, thus if your shutter is open longer more light will get on the film, thus lighter (number is in 1/fnumber)
ISO : Value/sensitivity of the film, higher values will be more sensitive thus lighter.

Here is an example: ISO:200, fnumber:6

Much more light huh, well this is only that starting point, you need to experiment allot. try different combinations/values
and read the manual on : http://www.spot3d.com/vray/help/150SP1/

Hope you find this usefull,

Cheers