Pseudo-3D engine

[BuoYancY_dabl]

1:17 AM and I just think: why not to create and add 3D engine for my game to render walls and some objects? I still have a lot of performance to implement that, so here's the idea:
Implement 3D for all the walls, including the fence (will be semi-transparent, just like window)
Implement 3D physics for objects and 3D props too
Implement some new stuff, like blood on walls or kinda.
Make player semi-3D (sprite over sprite things)