Try to remove the stroke around the sprite and sharpen it a bit, it would look good.
You could add a stroke to the whole sig as well ^^
Is that one of your first sigs?
I used a render, it could be that the render was a bit blurry but I myself didnt blurred anything.
I used photoshop to add some c4d effects, moved the render around, put it on hard light or so. I did not brush a thing.
Hello there, this is my first post and I just wanted to know what you think of this signatre :D
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greetings