i forgot to make the background transparant before i rendered this image, is there anyway i can make it transparant without re-doing it?
If you have just the render on the psd(if you saved it) copy it, make a new document. Change white to transparent. Just paste it in there.
dont use the magic wand alot of this render is white, you'll make it choppy, you'll have to re render the image
MAgiic wand will make it choppy LIke jay-tnuckvirp said you will have to redo it if you dont have psd