not sure i do it right, every time when i render a image with back drop or backgound image, and render it as high res. like 3000x3000, the object or figure stay in high res. but background seems still very low res.(even I use high res. background)and i end up have to replace the background image again, and it is hard work because the image in render was bent. and the replace original image is flat . very difficult to match up. did i do it in a wrong way?