2007
03.28
03.28
Hello people,
He a quick way to get an illuminiation based on a object / material
Here is a basic setup, just a simple box and three spheres.
When you render this with default vray settings and turn default lights off you get a total black picture.
What is logical cause you have no light in your scene 
Well openup the material editor.
create a new VrayLightMTL by pressing on the Standard button and choose for VrayLightMTL
Assign this to a sphere and press render again.
Now turn on your GI and set the value of the material on 5 and render it out.
You’ll get something like this:
If you get wrong results try setting ClampOutput and Subpixel mapping on in the ColorMapping rollout of vray.
[...] A very quick tutorial : link [...]
hi.. i’m a newbie in vray.. can u give me example about ClampOutput and Subpixel mapping differences when check on and off ?
Clamoutput “clamps” the values of the colors after the colormapping is applied. to white will get a max value of 1.0 (if you rightclick then rendering you can see the values of a color).
Normaly the is turned off and colors have a far higher range.
Sub pixelmapping controles of the color mapping is applied to a sub-pixel level of a imagepixel level.
handy rule in this is turn those on if you have white spots, AA problems, or bad reflections (spots)
Hi
then what is the use of this two (clamp output ND SUBPIXEL MAPPING)?
rakesh