Concept design for the Hellscape. An inter-dimensional environment that One is jettisoned through by Eleven at the end of Chapter 7 of ST4. The design was meant to be otherworldly and terrifying. I really liked playing with the idea of having two different cloud planes parallel to each other with conjoining lightning.
A very early iteration of the Hellscape showing One's transformation.
A really early concept showing the tear between dimensions and what it might look like seeing the Rainbow Room and Eleven from the perspective of the hellscape. It ended up being dropped, but would have been fun.