Twin-Screen Project: Idea

My idea for the twin screen project is a little vague narrative about a person travelling from one dimension to another, using the split-screen as the 'portal'.

The idea was going to use some green screen effects as well.
I planned to use a character/creature that resembles the chaotic from of both the natural world and the modernised human world fused as one.
The creature was to be my own version of the Green Man myths.

The theme/narrative of the film is that it is a divide between the systematic man-made world, and the disorderly, chaotic world.
In most media, a lot of people put emphasis on how "evil and orderly" the world of humans can be, but not many people tell of the unknown horrors of the "natural" world.

A person will walk through this portal, with the concept of escapism in mind. But finds how humans have evolved to the point where they can no longer survive in the "natural" world, lest the "supernatural" world.