A simple kitbash of a backdrop that improves its appearance is to cut off the white border, which they usually have in my experience. Take a look at this backdrop I bought several years ago:
I wish I cut off the narrow white border (that can be seen on top of the backdrop) before I mounted it on the wall.
It is in a very difficult to reach position and it's been mounted using double stick tape for a long time, but I hope to deal with that white border by either cutting it off or painting over it. Arnold