5.4.1 Sky

Prototype Information

Many modelers think of the sky portion of a backdrop as just a blue color of some kind. Depending on the modeling scale the sky can be an important or unimportant to the overall look and feel of the layout.

The color of the sky is different based on time of day, location, atmospheric condition, weather etc. It can be one color on very clear and bright days, it can be multi-colored from high to horizon based on   haze and dust It can be multiple shades of red based on sunrise and sunset conditions. It can be cloudy or cloud-free.

Modeling Information

There are several modeling techniques when it comes to creating a sky background.

Photomural. There are a variety of photomural companies that have sky either as a part of the landscape or sky individualized. Modelers can use a variety of software programs to 'cut and paste' sky images for printing and installation.

Single color. This  technique involves the use of one color. That color is painted onto the backdrop either by brush/roller or air brush.

Layered. One can reproduce a sky color gradient with a single blue, with increasing additions of white at lower levels. Alternatively, one can choose a range of blue colors from a commercial palette. The sky is hazier at the horizon and a deeper blue at it apex. Spray painting a soft band of white provides this affect. 

Trevor Marshall used three different colors as backdrop 'sky" : black, gray and plain blue fabric (or painted styrene sheets). He chose those colors as they aid in focussing one’s attention on the models.

Paint 

Sky color is in the eye of the beholder. Everyone has a different view to the color of sky. Custom color based on photographs or color determined by a color card are valid strategies. 

Here are some suggestions from modelers whose blogs I have read. A great forum to read about sky color is here. It's where I got the image on the right.

Behr paint Serene Sky 540C-2 in a flat finish.
Behr 540B-4 Horizon Haze (eggshell)
Benjamin Moore Blue Veil 
Behr Nevada Sky (520A-3) (Flat) with a Titanium White fade
Glidden " Wild Blue Yonder"
Walmart Color Place "Song Blue Sonata
Behr Utah Sky (560A-3)

Paint finish should also be considered. Finish choices are flat, eggshell, and satin. It appears that flat and eggshell are the prefered finishes (when stated). 

Clouds. See 5.4.2 Clouds for the modeling techniques.

The WWSL

The WWSL scenery rule is simple: I see the trees not the forest. Scenery is primarily close up. Mid - and far scenery doesnt exist on the WWSL except for a couple of locations: Satsop River, North River and Headquarters Junction. The majority of my sky is not seen, and what is seen is the look of a cloudless, sunny September day in western Washington.

Modeling Technique 

I used the single color technique. I used two sky colors. On the top level I used a medium blue I had formulated from a color photograph I took from the modeled area. The height of the top level and the right of way landforms forces the the viewer to look upward to the darker blue sky.

On the lower level, I used a lighter blue. also formulated from a color photograph. The height of the lower level forces the viewer to look straight (when sitting) or downward to a lighter blue sky.. 

The technique was easy. Prior to the installation of the track support sections I used a roller to paint the entire backdrop panel in the appropriate sky blue color. The technique is also easier to touch up when making cloud mistakes!

Basic upper and lower level backdrop sky color

Sky Modification. At each station section, modifications to the basic sky color can/will be applied. Satsop River will have a sky filled with darking clouds suggesting iminent rainfall. Other locations will have varying degrees of white billowing clouds.

Layered Method

Several modelers have written about their layered sky technique. You will find their techniques here and here and here.


Reference

Mike Danneman: PAINTING BACKDROPS FOR YOUR MODEL RAILROAD

Andy Sperandeo: A BACKDROP FOR THE WASHITA & SANTA FE – MR Nov 1982

Dave Frary: Realistic MODEL RAILROAD SCENERY – Kalmbach

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