Hmm, yea I guess I'm not understanding what the issue is.
I opened the file you uploaded in Max 2022. I placed a sphere behind the planes and added a VRay Light.
Here is the viewport preview and the render, with nothing else changed. Transparency on both seems to be coming through fine....
I opened the file you uploaded in Max 2022. I placed a sphere behind the planes and added a VRay Light.
Here is the viewport preview and the render, with nothing else changed. Transparency on both seems to be coming through fine....