Wall Development Idea

As the colour painting idea didn't work as well as I wanted it too, I now have to come up with another way to add detail.

Here is a cutout of grass which I will be using as an experiment:

Using a black marker pen, I started to draw lines to add detail to the grass:

By looking at the above photograph, I have managed to achieve the detail effect I was after. However, I'm not sure whether it would look good all around the room.

Here is another detail cutout experiment I did but of a miniature tree:

Rather than having just the tree as a solid cutout, I decided to cut into the tree to make the details. However, this I'm not sure whether this works as well as the first experiment.

Combination Idea:

With this experiment, I used a combination of both detail cutouts and the black marker details.

Now I have to decide which would look better for the whole walls.