Rhino Render not rendering material transparencies

Wondering if anyone has a quick fix or can tell me why my rendered scenes are not rendering material transparencies. The transparencies are working in the render mode viewport, but as soon as I start a render or switch to raytrace mode, the transparency goes away. I haven’t had this issue before, so I’m assuming I have a setting off unexpectedly.

Select the object with the material you say is rendering incorrectly, then export that selection to a new 3dm file and share that please. It will be hard to understand otherwise what is going on without seeing the material itself.