It would be interesting if it's true. I once had an idea for a CV that would be both 3D and 2D, handled in the way like Goonies 2 was. The 2D castle would have, about, 3 layers to it(Goonies 2 had 2 layers), and would be connected by doors you enter, and the transition would switch into 3D mode where you're going into the hallways on way to the other layers(different than Goonies 2's Shadowgate-esque first-person room exploration/transition). I also thought it would be cool if some bosses where fought in 2D, and others fought in 3D(entering the boss rooms in 2D would immediately transition into a full 3D room and bosses would be fought like LoI or LoS, then after the boss is defeated, the room reverts back into 2D).