Reflections + Alpha

[nils_p]

Is there a way to make for example a floor that does not render but reflections and shadows do?

Ik know mental ray has this feature

thx

[instinct]

In the VRay properties set the object to matte on, alpha contributions as needed, tick shadows and affect alpha if desired and leave the reflection amount at 1.0

Regards,
Thorsten

[nils_p]

Thanks for your reply.

I figured that one out aswell but my ground plane is still visible in the alpha channel. That's my problem.

[instinct]

Then you need to set the alpha contribution to 0 (to make it do nothing to the alpha) or -1 (to block out objects behind/below the plane).

Regards,
Thorsten

[nils_p]

Thx. I does exactly as you say but when I save to a .png for instance the reflection is gone.

I'll upload a sample file.

Thanks in advance

[nils_p]

Is this something that can't be done within the current limits of VRAY?

[re:FORM]

I'm having the same problem too. I'd love to know how to get a mat floor to render with reflections.

[RErender]

Thx. I does exactly as you say but when I save to a .png for instance the reflection is gone.

I'll upload a sample file.

Thanks in advance

It's in the png, just that PS does not show it. in a compositing prog you can invert the alpha and the add the reflection onto your background. To use PS save as a tga or something...

[nils_p]

Sorry for the late reply. been busy

I still can't seem to get this to work. Is is possible for you to explain step by step?

thx in advance!

[hassearo]

try using a standard material instead of vray mat

[nils_p]

How should that be different?

[nils_p]

one for the wishlist

http://www.chaosgroup.com/forums/vbu...ad.php?t=43901