When I read this part I thought you were going to say because you're technically not running Doom at all. That is, instead of running Doom without Doom's original hardware/software environment (by porting it), you're running Doom without Doom itself.
Isn't that possible by setting arbitrarily high goals for ray-cast rendering?
Not really? The greatest anti-Doom would be an infinite nest of these types of models predicting models predicting Doom at the very end of the chain.
The next step of anti-Doom would be a model generating the model, generating the Doom output.