This is where OpenSCAD gets a little finicky. Now, we’ll use an open source tool for vector drawings, called Inkscape, to convert the PNG to DXF. Now that our image is edge detected, and we can now save it to a file as a PNG. Lastly, we want to crop the image to make the details more visible, as well as reducing the complexity of the image, so the PNG to DXF conversion won’t take a long time. Adjust it until it the veins are thick, but there aren’t too many spots in the cells between the veins. Now, we want to make the veins a solid black and white. Move switch the positions of the black and white arrows in “Output Levels” After you open up GIMP, then open up the leaf vein picture above through File -> Open. Next, I fired up GIMP, an open source alternative to Photoshop. There were a good number of results, but I picked this one by Steve Jurvetson, which fulfilled my criteria above. I used flickr’s advanced search, so you can look for CC images. I also needed the image to be sharp (damn you, tilt-shift) with high contrast. I need something that was CC-BY, which allowed derivative works. That’s what the rest of this tutorial will help you do, and what I learned.įirst, I had to go find a creative commons image of some leaf veins. However, instead of drawing a leaf pattern myself, I generated the pattern from an image using free tools. To do something a bit more organic, my concept was to have a pattern of leaf veins for my iPhone backcover, Graftleaf. Yes, there’s too many 3D printable models of iPhone covers, but sometimes, we reinvent wheels not to have more wheels, but to have more inventors. Recently, to do a little bit of 3D modeling, I wanted to try my hand at making a modular back cover for my iPhone.
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