Step 1

Find a high-resolution photo. No matter what image you would like to display on your cardboard cutout, the only way to produce a visibly pleasing one is to use a high-resolution image that can be blown up to size without sacrificing quality. A good rule of thumb for large pictures is to only use picture sizes over 10 megapixels to ensure clean lines throughout your image. A quick Google search can yield some fast and effective solutions to this approach; type the words "high resolution" along with the kind of image you are looking for, and click "images" to narrow down your search to pictures only.