For the interior I wanted a cold cave type atmosphere and look, the walls would be rock like and there would be these sharp iceberg looking rocks going around the main space (To allow hiding spaces for the monster). The main colours would be black to give the feel of darkness and evil, purple for a magical mysterious feel and blue to give a cold feel.
I will show more of the concept later, below is how the build went.
I used a 9mm sheet of MDF and cut it down using a jigsaw. Below shows it put together using braces (using braces allowed me to take certain walls of for different camera angels and easily re-attach). Below you can see the interior was much bigger than the actual shed, i wanted the illusion of transporting to a new world (so if someone the monster didnt want came in, it would be a shed), this was the Alice in Wonderland inspiration.
I used mod roc for the walls, scrunching it to give the effect i wanted. I then gave it two coats of matt black wall paint (which i luckily had spare from 3 years earlier after painting my room) and then sprinkled blue and purple glitter on (I gave it another coat later on and added more glitter).
For the door i used MDF again which i cut to shape and used small hinges so it could be opened. I gave the door a different sort of shape to add to the feeling of being in a new weird distorted world.