The little village is painted with very simple shapes. Remember that the rooftops should be covered with snow. The Bevel and Emboss' highlight in Linear Dodge adds a nice highlight along the edges to suggest the setting sun. The shadow's Opacity is set to 0% because we don't need it here. Clip this layer along with the others to the tree/hill layer. Paint the windows on a separate layer so you can give them a bit of Outer Glow. Don't include them with the clipping mask layers because we don't want them to be affected by the atmospheric perspective as much as the other layers. The windows' luminosity will cut through the haze more than the buildings or trees. Paint a large field of PMS 5415 on a new layer for the snow. This range of greyish-blue is great to use for snow, especially in shadow. The key here is to remember that snow isn't white. A bit of light blue Outer Glow completes the look of the frosty haze.
Use PMS 5405 or 5395 to paint the shadow layers. Don't forget to set the layers' Blend mode to Multiply. For the sled tracks, I ended up using Overlay for the main portion, then Multiply for the shadow areas. The highlights are painted on a layer in Normal mode to make them look more dense and substantial. Just pick colors from the highlight areas you have already painted. Now zoom out and see how it all looks. We are trying to get a luminous feel on the left side of the image. Darkening the right side may help to achieve this. If necessary, add a gradient on another layer in Multiply mode and play around with the Opacity until you like it. Something like this should work.