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Quick Digital Watercolor from Google SketchUp

Jim Leggitt

Quick Digital Watercolor from Google SketchUp

I have been recently investigating how to create fantastic hybrid watercolors (combining traditional hand drawing with digital imaging) and decided to apply my process to a recent project. This digital watercoloring technique simply involves building a Google SketchUp model, hand coloring over a print with markers and colored pencils, then applying the watercolor filter to the image in Adobe Photoshop. It’s that simple!  Start to finish, I took less than 8 hours to build the model and complete the digital watercolor. Here is my “step-by-step” explanation of this exciting hybrid visualization method.

Thumbnail Concept Sketch

ThumbnailConceptSketch

I began with an idea, some tracing paper, fellow designers (some wine) and sketched out an idea for what a small visitors center might look like adjacent to an existing two story house.

SketchUp Model

SketchUpModel

I was able to combine some existing site photographs and a satellite image from Google Earth to quickly build a 3D model of the existing site.

googlesketchUp

Adding a photograph in the background of the existing site view, I built a semi-detailed SketchUp model showing the two-story house with a cluster of adjacent museum buildings, outdoor exhibits and observation tower. The entire model took about 4 hours to build.

googlesketchUp

To prepare the scene for my hybrid watercolor process, I exported the image without the edges (left) and with the edges only (right) in order to recombine them in Photoshop are different levels of transparency.

googlesketch

Final SketchUp Print. Notice how light and faded this image looks. In order to add back color with markers, I needed to lighten the image and linework. Using layers in Adobe Photoshop, I gave the basic image layer a 75% transparency and the edges layer a 50% transparency. This “fading” of the image was critical to the success of the digital watercolor method! All images were 300dpi by 17 inches wide.

Hand Coloring with Markers and Pencils

handcolor

I completely colored the print using very light colored Chartpak AD markers, dabbing the markers and overlapping the marker lines in order to give it an informal appearance. I highlighted top edges of window mullions, furniture, people and roofs with a white Prismacolor pencil. The colored 11x17" print was scanned at 300dpi as a jpeg.

Photoshop Watercolor Filter

PhotoshopWatercolorFilter

I applied the watercolor filter to the image using the settings Brush Detail 14, Shadow Intensity 0 and Texture 1. The level of filtering was sufficient after the first round but I chose to filter it a second time and was much more satisfied with the effect. After the water coloring filter was applied, I adjusted the contrast levels of the image to deepen the blacks and lighten the whites.

filterofwatercolor

To summarize the process, 1) export your SketchUp model view as different layers that are recombined in Photoshop, lightened and printed on 11x17” paper, 2) hand color the print with markers and pencils using an informal casual technique and 3) scan the colored print and modify the image in Photoshop using the watercolor filter.

Cross Posted from Jim Leggitt's BLOG

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