The result is a bit dark. I decided to set more lightning to the scene. I gave new adjustment layer > brightness/contrast above all the other layers. Please see the illustration picture:
I gave another new adjustment layer > selective color:
The night atmosphere is still dull so far. I decided to make it brighter. Duplicate the nebula layer and place the duplication layer top most layer. Set it to soft light at 80% opacity. Give it a layer mask and mask the tree area.
In this step, we will add light to the lamps and some highlight to the lower trees. Create a new layer (Shift+Ctrl+N). Fill (Shift+F5) this new layer with black and set its blending to color dodge. Firstly, we will give highlight to the lower trees. Set the foreground color to white. Take the brush tool, set its opacity to 5. With a very soft round brush selected, stroke gently the desired areas on the lower trees (see the illustration) until finding desired highlight. Finally, after finishing the highlight, proceed to give light to the lamps. Set the foreground color to #fcb004 and stroke the brush to the lamp area. Try to vary the color among #fcb004, #fe9024 and white to get better light.
I I decided to clean out the unnecessary leaves. Create a new layer. On this new layer, paint over the leaves. Take the nearest color around the leaves as the sample color to paint. Use soft brush at opacity varying to 20-40 %. Finally I gave black gradation at the bottom and edges of the scene. I also darkened the right side of the main house to give it some shadow.
Download the PSD
Surreal Treehouse.zip | 23.59 MB