it looks better now... and i noticed that the render needs some blending... but its not really necessary however..

if you want to try how it looks:
duplicate the render
take the render that is below and go to Filter>blur>gaussian blur
play with the numbers...

when blended, it should look like theres some blur on the contour of the render and it "blends" more with the background...

however, you can keep it like that