Bayram An - Submissions - Cut-Out Player Faces Megapack
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Background and Stadium Packs
Timeline
@salih topazik, your original cut was cropped too far above the top of the head, included no collar and had some of the hair removed. This thread contains guidelines for what we're looking for in our cuts in terms of dimensions, snow, collars, face orientation etc. and video tutorials for each element.
The source isn't too bad and I think you should be able to get better results if you follow the below. I would recommend using remove.bg, which is a free online tool which removes the background to an excellent standard, for free and almost instantly.
Here's a couple of videos on how to use it, one when combined with Photoshop and another using photopea.com, which is a free online app so close to Photoshop that it has the same shortcuts, layout and icons.
If you don't have Photoshop, photopea.com is the tool I would recommend to use to tweak the draft cut produced by remove.bg. It's more powerful and versatile than GIMP and other similar tools.
@salih topazik, can you upload the original source image without the background removed?