Wednesday, April 23, 2014

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

New improved method that uses 6 line script to aid in filling the manually selected polygon with average color is located here ->

This post is also posted on GIMP LEARN (where you can register and share your polygon art as well).
Or search for polygon art on GIMP LEARN

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.

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).

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".

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.

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.

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.

There's now a javascript app which runs in your browser to help you create these polygon arts quicker (you just have to load an image and then select vertices to define polygons, and the app will figure out the color for you).
- Run the javascript app online
- Download the javascript files (zipped, you just have to open index.html, download to run locally on your PC offline
- View Polygon Art App demo video
- Go to Polygon Art App facebook page (where you can share/view polygon arts)