This "making of" tutorial shows the steps taken to create an aerial rendering of a school campus partially from a photograph.  The client had several aerial photos taken of a newly completed addition to the campus.  One of the photos showed some of what we needed and from a good angle.  This photo became the basis for the rendering.
The photo only covered a little over half of the area we needed to show.  So the first step was to expand the view out, using satelite images and a Sketchup model to accurately determine how the elements would be placed.  Trees were copied and pasted from the right side to the left, grass and streets were painted in, etc.
In this view, the gymnasium and aquatics buildings (the primary reason for the rendering) are overlaid for a "test fit".
While the client was still tinkering with the design of the gym/aquatics building, I proceeded with adding the parking lots, cars, trees, and walks that would be needed.  I also started to "break down" the overall image to create a more painterly look - through a combination of overpainting, and procesing with filters to simplify the color/detail.  Vingetting is also added to bring focus to the center of the rendering.
Once the design was finalized, I set up a shot in Maxwell Render to approximate the sun and light levels of the image.  Note that the model included some of the existing buildings - these were used to help match this patch to the perspective.
Once the final building was spliced in, layers of texture (watercolor paper, dot splatter, etc.) were added, along with more layers of overpainting to strengthen areas of color.  Though tiny, people were added to the playing field at left and playground by gym.  The last step was to copy the overall image and add a "high pass" layer in overlay mode at the top of the stack to add some crispness to the image.
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