dgs material renders no Alpha channel

[Myron78]

how can I fix this? I'm using poly's and a HDR image on an image based lighting sphere and one directional light. not complex at all.

Thanks

-Myron

[remydrh]

Be sure you have checked "pass custom alpha" in the render settings.

[Myron78]

I cannot find this option. what tab and pull down menu is it in?

[BigBucks]

it is in mental ray render globals custom entities

[Myron78]

got it. thanks!