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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. enter image description here

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?

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Trace your object as SGV and import it to blender. Once it blender it will be a series of curves that you can manipulate as you want.

enter image description here

For a tutorial on using inkscape to do this porcedure watch https://www.youtube.com/watch?v=ows2QTiMRPg

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  • $\begingroup$ Thankyou for the reply! This helped me a ton with my project. $\endgroup$ – Renamon Toast Crunch Feb 23 '15 at 22:18
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I would extrude a single vertex around, building the model up instead of cutting it out.

⎈ CtrlLMB LMB can be used to extrude and position geometry in one step, or E can be used for a two step extrude and move.

enter image description here


That said you might get a similar result much more easily if you auto-trace the image into a vector SVG with a program such as inkscape, then import the SVG into blender.

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