Vray Q&A

[julius]

first !

Did you succeed in using the multimatte output of Vray ?

I set id's of my objects to 1 with a VrayObject property, and put a multimatte in the output of my pass and set the red input to 1. Then I hide lights and turn off GI. But nothing.
Don't understand how it works.

Thanks

[Bullit]

How does it works in Max? that will show you how probably works in Softimage.

[julius]

I don't know, I'm trying to find a max tut.

[origin]

In max it's the same. Dunno how the multimatte UI looks in xsi but in max you have to uncheck material ID (for object ID) and turn on r/g/b. Then render to multichannel exr, thats all, you don't need to render separate pass.

[julius]

My rendering format is .tiff

I saw a max tutorial about that, and the only difference is that I don't use the Vray framebuffer. I'll try to access masks like that.

[julius]

Ok that's it : we must use the VRay framebuffer to access render elements such as masks, reflections and so on.

[origin]

Just installed demo. I don't see tiff format in vray image output. Exr multichannel/others renders multimatte just fine.

[julius]

yes sorry, my output is .pic, no .tiff

Do you render with Vray framebuffer ?

[origin]

No. Vray framebuffer is just more advanced viewer.

[julius]

mmm, so I think I got it : render elements are channels. These ones does not work like passes and are rendered with the main frame, at the same time.
So I was missing this point as I didn't saw directly the result in the render region. I'm so used to work with passes...

[angelous4x]

Hey


this is a total stupid question.
can any one give me a walk though on how to add volume rendering for vray. and maybe a RGB matte for it?

just adding the volume shader from vray doesn't seem to work. is there anything extra i need to do?