Yesterday, while watching golf, I saw a commercial that folded paper out of a book into buildings that turned into a town which then grew into a city, etc. The commercial caught my attention not only because of its execution and concept, but also because the illustration style was simple and clean using only paper as the material. This inspired me to experiment with a blueprint style that maintains some of the great qualities of blueprint drawings, but also gives the appearance of the design projecting off the page 3-dimensionally. There are many subtle things going on with this image such as faded guidelines similar to what you would see on a hand drafted drawing as well as textures meant to appear as imperfections left on the paper from the blueprint chemical processes.
To get started, 3 images will be generated which will be used in Photoshop. Two of them will be exports from Sketchup, and one will be a basic rendering from Kerkythea
IMAGE 1- BASE IMAGE
1. In Sketchup, save a view/scene that you want to use for the illustration that way you can get back to the same view later if need be.
2. Switch the Face Style to "HIDDEN LINE." Under View>Edge Style, check "DISPLAY EDGES" and "PROFILES."
3. In the Styles dialogue box, select the "EDIT" tab, choose the "EDGE STYLES" icon, and check "EXTENSIONS." Set the length to 8 pixels.
4. EXPORT the image as a JPEG, "FILE>EXPORT>2D GRAPHIC."
IMAGE 2- GUIDES. The point of this second export will be to imitate guidelines seen in hand drafted illustrations back in the good old days.
5. Select "VIEW," and check "GUIDES."
6. With guides turned on, begin creating guides that accentuate important axis or angles in the image. To create guides, measure something with either the ruler or the protractor. Whatever is measured will then turn into a guideline.
7. With the guides in place, go to FILE>EXPORT>2D GRAPHIC and save the image as a JPEG. Again, use the face style "HIDDEN LINE" and leave only "DISPLAY EDGES" checked for the edge style.
IMAGE 3- BASIC KERKYTHEA RENDERING. This Kerkythea rendering is very basic with minimal setting changes. The rendering itself only took 10 or 15 minutes to finish because of the limited use of materials.
8. To begin, export the model from Sketchup using the Kerkythea plugin. Be sure that shadows are on and that the view you want is set. In the export options, follow the settings below double checking that "CLAY" is set to "YES."
9. Open exported model in Kerkythea. At the top, select "SETTINGS>SCENE." In the scene settings dialogue box, choose "INVERSE" in the attenuation drop-down box. The setting will give you soft shadows similar to what you would get on a cloudy day.
10. That's the only setting that needs to be changed. Time to render. At the top, select "RENDER>START." In the dialogue box, DO NOT change the resolution. However, do change the "SETTINGS" to "07 PHOTONMAP -HIGH+AA03."
11. Let the rendering cook for a few minutes. To preview and save the final rendering, choose "WINDOW" at the top and check "RENDERED IMAGE." With the preview box open, select the "SAVE" button to save the image to your hard drive.
11. With the 3 images complete, it's time to combine them in Photoshop. Begin by opening the first image (Sketchup export with extended lines) in Photoshop. Choose "IMAGE> ADJUSTMENTS>INVERT."
12. Next, open the Hue/Saturation dialogue box by going to "IMAGE>ADJUSTMENTS>HUE/SATURATION." In the dialogue box, first check "COLORIZE." Shift the "LIGHTNESS" slider to the right to lighten the black background to a grey color. Next, move the "HUE" slider till you end up with a good blueprint color.
13. Drag in the other Sketchup exported image of the guides and move this layer to the top. Again, INVERT the image so that the line work becomes white on a black background.
14. With this guide layer still selected, change the "LAYER BLEND MODE" (drop down box in the layers pallete) to "SCREEN."
15. Open the Kerkythea rendering and drag it to the top layer. Desaturate the image by choosing "IMAGE> ADJUSTMENTS> DESATURATE."
16. The image is a little flat. Adjusting the levels will fix that. Adjusting the contrast would also work, but I prefer levels because of the added control. Choose "IMAGE>ADJUSTMENTS>LEVELS," and move the sliders until you end up with lighter and darker tones similar to the second image below.
17. Making sure the Kerkythea rendering layer is on top, set the "LAYER BLEND MODE" to "MULTIPLY."
18. The illustration is almost finished. The last step is to add some texture to imitate the texture created from the blueprint chemical process. To do this, I just went online and found a "grunge" texture similar to the one below. Open the texture in Photoshop and move the layer to the top.
19. Finally, set the "LAYER BLEND MODE" of the grunge texture to "OVERLAY."
That's it. The first time I created this illustration, it took me about 1 1/2 hours to make including testing different settings and waiting for Kerkythea to render. Now that I have the workflow down, I'm guessing it would take about 30 minutes to create subsequent illustrations. The techniques are pretty basic, but it's finding the right combination of layer blend modes and textures that give the final illustration a unique character.