Use the up and down arrow keys to zoom in and out. Use the right and left arrow keys to change between the two images. You can drag the image around.
This is a knife I am making. When I am finished with all the details it will be 3D printable. All the texturing was done procedurally except for the HDRI background. It is based off the dagger used by the crew members of a webcomic by Minna Sundberg: http://www.sssscomic.com/
