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GIMP TutorialsHow to create a polygon art in GIMP, manually done by hand. (Showcase | Slideshow)

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trandoductin

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How to create a polygon art in GIMP, manually done by hand.

Post#1 by trandoductin » 26 Sep 2016, 23:01


New improved method using a 6 line script here -> https://gimplearn.net/viewtopic.php?f=3&t=865


1) In GIMP, load an image that you'd like to use as reference to create polygon art out of.
2) Make sure the image doesn't have an Alpha Channel. You can do so by right clicking on the layer that contains the image and click on "Remove Alpha Channel" like shown in image below.
002.png
002.png # (44.33 KiB) Viewed 1596 times (Watermarked | Thumbnail)
3) Click on "Free Select Tool", then select a polygon (in this example, we're selecting a triangle by clicking on 3 points of the triangle and then click the first point to close the triangle, like shown below).
003.png
003.png # (120.87 KiB) Viewed 1596 times (Watermarked | Thumbnail)
4) Click on "Color Picker Tool", then click on the middle of the polygon (selected in the above step). To get an average color sample, you can adjust how large the area of average color area will be in the options of the "Color Picker Tool".
004.png
004.png # (90.65 KiB) Viewed 1596 times (Watermarked | Thumbnail)
5) Now that we have the average color (of about the middle of the polygon) selected as foreground color, we swap foreground and background color by clicking on arrow (highlighted in image below) to make that the background color.
Alternately, you don't have to swap foreground and background color if you Tick the "Set background color" in the Tool Options while having the "Color Picker Tool" selected.
005.png
005.png # (71.17 KiB) Viewed 1596 times (Watermarked | Thumbnail)
6) Now to fill the polygon, with the background color, we simply cut away the polygon by hitting Ctrl-X (hit Ctrl key and hold it and hit X key) to cut. And the polygon will be replaced with the selected background color (since we don't have Alpha Channel in our image, it will not be transparent, this was done in step 2 to make sure it doesn't have an Alpha Channel). The polygon will look like below image.
006.png
006.png # (48.69 KiB) Viewed 1596 times (Watermarked | Thumbnail)
7) Repeat step 3 to step 6 as many times as needed to fill the whole image with polygons, and you'll have a piece of polygon artwork manually done by hand.

If you're patient enough to finish, you can end up with something as beautiful as this(shown below) or even better depending on how creative you are with the polygons. Good luck and enjoy. And don't forget to share your polygon art masterpiece here in reply to this thread.
bruce_lee_polygon_art.png
bruce_lee_polygon_art.png # (248.59 KiB) Viewed 1570 times (Watermarked | Thumbnail)
Alternately, you could use a javascript app to help you create your polygon art (the code is a little slow but it works). You just have to click on points to define your polygons after opening an image. The app can be found here --> Polygon Art Javascript Application (altered code)
Last edited by trandoductin on 08 Oct 2016, 06:05, edited 2 times in total.
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trandoductin

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Post#2 by trandoductin » 26 Sep 2016, 23:08


A polygon art of a car.
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polygon_art_car.jpg
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trandoductin

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Post#3 by trandoductin » 26 Sep 2016, 23:09


Polygon art of Mona Lisa
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polygon_art_mona_lisa.jpg
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trandoductin

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Post#4 by trandoductin » 26 Sep 2016, 23:10


Polygon art of a friend's dog.
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polygon_art_dog.jpg
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