Use these steps to export your Unity scene and import into Maya for a nicer render.
Select Window->Package Manager
Choose Advanced->Show preview packages
Select FBX Exporter
Close the window
Select the models you would like to export, (Primitives will export too.)
Choose Game Object->Export to FBX...
Export into your Assets, you can move the file later
Choose File Import...
Import the fbx file into Maya
You will need to scale the models by .01