This was my original work from a contest for QC.
I made most of the scene and the tentacles in 3d and rendered in Blender using Freestyle. The wall tile was painted inside Blender and added as a texture.
I wasn't able to finish the small details and shading and after the deadline i left it there.
I planned a lot of gore, but sadly there was a rule about violent content and i had to censure the work. Here is a sketch of the original gore version.