Once I got the overall mood for this scene, I started to painted in low opacity a soft light yellow to brighten the background, and brown for the dark part of the clouds, to give it more shadow. I also painted the edge of the clouds that received the light most from the sun to defined more the clouds shaped.

Painted the shadow for the buildings and highlight to where the sun light fell .Started to add an intensity for the sun with various size of soft brush and low opacity.

Adjust the level to gain the contrast and give an orange photo filter layer again, only this time, the layer will affect most for the foreground and middleground part.

To got a soft feel, I pressed Alt+Ctrl+Shift+E to stamp all the visible layer in the new layer, cast a gaussian blur and change the layer mode to screen with opacity decreased.

Paint a soft light green for the sky in overlay mode, defined more the shadow for the building. I also create the layer for radial gradient, to help increasing the contrast of the image