Why uneven and shaggy edges on copy/pasted objects

[iMacKalle]

Hello.

My first work there I move one object from one image to one other by copy and paste with tool Selection Brush Tool with Ctrl down. But the result looks terrible. I expected to se one smooth copy. How can I solve that.

 

 

 

[iMacKalle]

I solved the problem by using Refine.

 

Thank you.