I am trying to cut out a rough outline of the background image to hopefully make a 3D Model of it as seen in the screenshot below.
Originally I used the knife tool but that tool only cuts OUT the cuts (the outside) and not cuts out the inside. So in a way I want to use the knife tool to trim my cube more and more until I have a model of my background image.
Any help or ideas? Is there a way to cheat and make a rough model from the background image? How would I achieve my goal with the knife tool? Is there another tool I should use instead?