Picture frames with transparency in layouts

I’ve noticed that when I place a png with a transparent background into a layout it prints with a gray background. If I print the same png from photoshop the background is completely transparent. The images I’m using are renders from flamingo.

Hi Owen,

Can you provide the file(s) so I’m sure I’m looking at the same thing. Also, what versions of Rhino and Flamingo are you using?

I’m using rhino 5sr9 and flamingo NXT. I’ve attached the image I was using.