As a suggestion, something that might be no challenge but a great assist? One of the reasons perspective is so hard in hm is that the Background / Shapes stuff is all either 2d or gradient. It’s actually really tough to line up diamonds for an off-center cube. To take a hero fight INSIDE, I would think some generic Tetris 3d shapes would be really helpful. An off-center cube, hollow or solid. A washing machine shape–perspective cube with a ‘lip.’ A cube with legs would easily become anything from a safe to lab apparatus.