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RE: Tutorial Part 2 | How To Vectorize Doodle Using A Free Online Tool And Create A Transparent PNG In GIMP (and use that doodle on Redbubble products)
I am glad you found it's useful @orangina. However bear in mind that the final image has been converted back to a raster image so it can get pixelated if your resolution is too small. I intentionally left out some information like the differences between PPI vs DPI, resolution and image size because every POD sites have different requirements.
I used 300 dpi...should I use something bigger? I did notice that when I added color, darker colors have a tiny white line between the color and the outline...maybe that is why?