enter image description hereI tried to use the "Knife project" tool in order to shape a soda can ring but, even though I selected both the object supposed to cut and the object "to be cut", it only results in the message "No other selected objects found to use for projection", nothing else. What is causing this? How can I fix it? Thanks in advance.


Your shape seems closed, it looks like it can't work this way, so just open it:

enter image description here

  • $\begingroup$ Thank you for answering. How do I open an object? Sorry, i'm new to Blender. $\endgroup$ – HEV Suit Jan 14 '19 at 12:44
  • $\begingroup$ select the object, go in Edit mode, select a face and delete it $\endgroup$ – moonboots Jan 14 '19 at 12:48

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