Alpha channel issues

[SebAdebeo]

Hi,


I try to make a simple interior rendering with a view and I have a problem with the glass window neutral material, looks OK with the transparancy and reflection but when i need to save the Alpha channel i got only black and white image (no grey on the windows)

Just need the alpha of the windows to add the background in photoshop.

Thanks.

[SebAdebeo]

Ok my bad, just forget to check the "affects channels" for the material.

But now i have a little question, in vray 3.6 (for sketchup) the Affects channels was set by default on "all channels" and now on vray next it's on "color only" ?

[Peter.Chaushev]

This change is due to the update of the underlying plugin structure. Thank you for reporting it. An internal discussion on whether to keep the new default mode is now scheduled.

Kind regards,
Peter

[Peter.Chaushev]

It was decided that the default Affect Channels mode will remain "Color Only".
If you wish to modify a particular scene's materials by setting up all their reflection affect channels mode to "All Channels", please copy the following code snippet and paste it in the Ruby console (Window > Ruby Console):

[FONT=courier new][B]VRay::LiveScene.active.grep(:BRDFVRayMtl).each{|p| p[:reflect_affect_alpha] = 2}
VRay.refresh_ui[/B][/FONT]

The value of 2 corresponds to the mode "All Channels", 1 is "Alpha only" and 0 is "Color Only".
If you wish to use it for material refraction, substitute "reflect_affect_alpha" with "refract_affect_alpha".

Kind regards,
Peter