Add atmospheric fog and foreground depth
but first, let's add a bit more atmosphere to the scene.
I'm going to use this fog image and integrate it into the composition.
[A rectangular transform box appears around a layer containing mist.]
We set the layer blend mode to Screen [The mist layer is enlarged and positioned across the bottom of the corridor.] and scale it until we find the position that works well.
The problem is that right now the fog looks too wide and distracting, [Soft white mist now spreads across the foreground, partially covering the floor.] so I'm going to sample a bluish color from the sky using the Eyedropper Tool, brighten it slightly and paint over the fog.
[Blue covers the screen.]
Then we set the layer to Multiply [The entire photo has a blue tint.] and create a clipping mask using Alt or Option, so it only affects the fog.
And now comes an important part.
By double-clicking the layer, we open its properties and move this slider, so the blue tones don't affect the entire fog evenly, giving it much more depth and volume.
Then we lower the Opacity slightly so it blends more naturally.
Now I'm going to erase some of the fog on the edges because it looks a bit too artificial.
We add a layer mask and using a large, soft, slightly flattened brush, paint in black little by little to remove those areas.
[A new window reveals a picture of a variety of rocks.]
Next, I'm going to place these rocks in the foreground to create more depth and help frame the composition.
We remove the background automatically, [A progress bar appears.] bring the rocks into the scene, and place them around the lower corners.
Then we duplicate the layer to reuse some rocks on the opposite side.
[The rocky foreground is resized to span the width of the scene.]
Once everything is positioned, we merge the layers and use Harmonize to integrate them better into the scene.
[A progress bar appears.]
