Alpha channel for RhinoV6

[C3Design]

I am using images with a transparent Alpha image and in the material editor I can check 'Use Alpha Channel' and the rendered preview mode in Rhino6 crops out the Alpha channel as expected. But the Octane render shows the Alpha as black. What do I need to do other than that to get the Alpha channel to work in my Octane render?

[face_off]

Is it a Rhino Material or an Octane Material? Can you provide a screenshot showing the material and the result pls?

Paul