User blog comment:Telaruhn/Centus, The Sunfire Bowman/@comment-3286233-20120428131016

If you have Photoshop, you can fix those dark edges like other champion portraits:

Go to Blending Options for that picture of yours.

Add "Inner Shadow" where you put:


 * Opacity to 100


 * Distance to 0


 * Choke to a number where you will get good black outline


 * Size where you will get the frame the way you want.

Check more at those portrait from other champs how the shadow square looks like if want to match it properly.