I found the negative space in my picture by tracing the lines of the picture with the blunt end of a pencil, then following the lines, I used the razor to cut out the pieces. I glued the positive space down first, then I used the pieces left over to make the negative side.
It helps artists to see into negative space so they can see the outlines of drawings, and it's a unique form of art.
Negative space can enhance drawings if used in the correct way. If the picture is mostly negative, then the darkness drowns out the picture and you can't see it correctly. If it's a good mixture or negative and positive space, the artwork can really be enhanced.