object on white with GI question???

[moocowfish]

Hi there everyone, i have a question which im sure you will see as being very simple, but i just cannot work it out. I have a cube with a vray light on it, i would like to get the cube on a white background with the shadow and gi remaining, i used to use the (matte/shadow) material on scanline render but cannot get anything simular to work in vray.
hope this makes sense?
any help much appreciated.
thanks
Rob

[RErender]

Two options:

1. Right click the plane object and select vrayproperties. There you will find matte properties check it and also turn on shadows.

2. Apply a material with a vraymaterialwrapper there you will see the same matte options.

[moocowfish]

thanks rerender, ive plated around with these, but i cannot get the GI effect to go onto the material, just direct light shadows, is this me, (probably).
thanks
Rob

[Mirko]

Don't use the MatlWrapper on the plane. Just a normal white Material should work fine. Then open the VRay properties of the plane and activate the following settings:

- Matte object (on)
- Alpha contribution -1
- Shadows (on)
- Affect alpha (on)
- color (black)
- Brightness (1)

Then render the image.

[moocowfish]

thanks mirko, for the simple-ton way of fixing my problem, ive tried the settings and it works fine. It was the (-1) alpha contribution that i was not doing.
thanks again
Rob