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I drew a pixel art tree using GIMP. My problem is, how can I cut out the white background, because if I want to build a tile map with it, in my case with tiled, it always has the white background with it.

I know you can cut it manually, but I want to know whether there is an easier way.

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You need to right click the layer and select "Add Alpha Channel"

Then you can do one of 2 things...

  1. Use the "Fuzzy Select Tool" to select the white color (you can adjust the tolerance to select more or less of it) and delete the area.

  2. Go to "colors > color to alpha" select white and hit okay.

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  • \$\begingroup\$ I can not recommend "color to alpha" in this case, because it makes everything transparent depending on the similarity of the selected color. So you will end up with a sprite where some pixels are not 100% opaque. \$\endgroup\$ – Philipp Feb 25 '18 at 17:17
  • \$\begingroup\$ That's true. There are more complicated techniques, but usually a mix works well. Fuzzy select the white, expand the selection by 1 or 2px, then color to alpha the selection. \$\endgroup\$ – Kyy13 Feb 26 '18 at 5:43

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