In version 12, you can create a scene in Unity from 3d graphics like this:

<< UnityLink`
project = FileNameJoin[{$UnityLinkResourceDirectory, "ExampleData", 
   "hello-world"}];
UnityOpen[%]
umaterial = CreateUnityMaterial["material", RandomColor[]]
sphere = CreateUnityGameObject["sphere", Graphics3D[Sphere[]]]
SetProperty[sphere, "SharedMaterial" -> umaterial]

Now, I'd like to raytrace the scene exporting it to an image? Is this not a fundamental feature of modern gaming engines?

In version 12, you can create a scene in Unity from Graphics3D objects like this:

<< UnityLink`
project = FileNameJoin[{$UnityLinkResourceDirectory, "ExampleData", "hello-world"}];
UnityOpen[%]
umaterial = CreateUnityMaterial["material", RandomColor[]]
sphere = CreateUnityGameObject["sphere", Graphics3D[Sphere[]]]
SetProperty[sphere, "SharedMaterial" -> umaterial]

Now, I'd like to ray trace the scene - exporting it to a high quality image. But I can't see how. Is this not a fundamental feature of modern gaming engines?