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My issue is that I have 2 objects in edit mode, I want to use the second object to cut the first one to make a hole.

I hope the image can make what I want a little clear because I don't find the right words to explain that.

Thank you~

enter image description here enter image description here

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  • $\begingroup$ Use Knife Project tool. $\endgroup$ Commented Dec 26, 2019 at 11:42
  • $\begingroup$ I can't use Knife Project, it's not working $\endgroup$
    – Elkazi
    Commented Dec 26, 2019 at 11:50

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Use the Knife Project tool.

Blender Manual
To use Knife Project, first while in Object Mode, select the “cutting object” then select the “object to be cut”. Now, enter Edit Mode and press Knife Project (found in the Mesh > Knife Project).

When you're done, just delete the "cutting object" and also any unwanted faces from the cut object.

enter image description here

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  • $\begingroup$ I can't use knife Profect, I get a message said "No other selected object found to use for projection" I think because bot of the is inside the edit mode $\endgroup$
    – Elkazi
    Commented Dec 26, 2019 at 12:33
  • $\begingroup$ Sure. In that case, just select the polygon and separate it into another object. Mesh > Separate > Selection. $\endgroup$ Commented Dec 26, 2019 at 12:47
  • $\begingroup$ it's work like a magic~ Thank you a lot, you too Lukasz-40sth Respect $\endgroup$
    – Elkazi
    Commented Dec 26, 2019 at 13:33

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