Creating my Poster

Firstly, I isolated the two subjects using the 'Quick Selection Tool' and copy and pasted them into a layer of their own. This will allow me to edit the background without affecting the subjects.

Next, in order to make the world look more ruined and post apocalyptic, I wanted to 'smash' the window that can be clearly seen.

I used the 'Skew' transformation option to fit the broken glass image into the window space.

I then altered the blending mode to 'Overlay' and changed the opacity of the layer to 50%, this made the window look more in place in the scene.

However, the window was too sharp, and needed to be more out of focus as it is in the background. I used the Gaussian Blur tool to achieve the desired effect.

This is the finished smashed window effect.

Following this, I added more elements to the background to make the world look ruined. This includes papers at the character's feet, piles of rubbish, mould on walls and puddles in the pavement. This gives the impression that the street has been abandoned.

I wanted to make the poster more ominous, so I set out to add some fog. To do this, I used the Render Clouds tool.

This was the outcome of using the tool. The effect is too aggressive and does not look good.

To fix this, I changed the layer's blending mode to 'Multiply' and altered the opacity to 70%. This was much closer to the effect that I was looking for.

I then erased the bottom part of the clouds so that they appear to be in the background.

I used a small, soft brush to add shadows beneath the feet of the subjects, making it more convincing that they are standing on the papers.

I also used the Render Clouds effect on Abby's t-shirt to make it appear dirty and worn.

At this point I thought that the image as a whole was too bright, and did not give the 'bleak' impression that I desired. To fix this, I used the colour Variation Adjustment tool to make the shadows slightly darker and the highlights slightly lighter. I also altered the saturation of the image to make it less colourful. 

This was the effect of the colour variation.

I also wanted to make the picture look more rugged and give connotations of violence. To do this, I added two different scratched textures by changing the blending mode and opacity of each layer. I erased part of the texture around the subject's faces so that they can be seen more clearly

This is the result of adding the textures.

Finally, I added text to the poster. I textured the text by using the same technique as shown above. I also added subtle drop shadows to each piece of text to make it stand out more and be more legible.