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    Knife Tool madness

    amyeha
    posted to: Start Adding Geometric Details

    I'm glad to see I wasn't the only one having some weird knife stuff happening. It created double and sometimes triple vertex, on top of creating random geometry next to my model. Had to check every time I used it, was kind of crazy. 

    Reply
    • Kent Trammell replied

      You bring up a good point. The knife tool is more of a precision operation. If you're not diligent to connect exactly to a vertex or edge, it will generate unwanted vertices.

      You're definitely not alone :)

    • a
      amyeha replied

      How precise do you have to be? Because I'm getting some funky stuff. I'm starting to feel like I accidentally did something wrong with this particular piece. When I first went into edit mode I had to delete a weird double, and it's been doing this on almost every cut I make. Sometimes it even creates a third vertex that's not attached to anything. It's really weird.


    • Kent Trammell replied

      That doesn't look right...You appear to be plenty precise to avoid those duplicated verts. Could you post a link for me to download your file? (The best way to do this is uploading to dropbox or equivalent file hosting site and copy+paste a download link)

    • a
      amyeha replied

      It's probably just easier to start that piece over, but I'm curious to see what you find because I'm floored on that one. Every time I cut that particular section something totally different happens, which is kind of funny at this point.

      TreasureChest

    • Kent Trammell replied

      aamyeha Thanks for the .blend file. I opened it and it appears to be the default blender scene (cube, camera, light) rather than a treasure chest model...but I still tried my knife tool on the cube and it worked fine for me 🤔

      Could you try resetting your Blender to factory defaults and try the knife tool again? You can do this with File > Defaults > Load Factory Settings

    • a
      amyeha replied

      That's weird, oh well. I tried resetting and it still acts similar. It seems to only do that on this particular mesh, so I'll just delete it and continue from there. Thanks for trying, really appreciate it!!

    • Kent Trammell replied

      Maybe your mesh is accidentally duplicated with verts on top of verts. Try selecting all vertices with the A hotkey and then go to Mesh > Merge > By Distance.

    • a
      amyeha replied

      I tried before asking and it didn't change it. I reset my settings, turned off add-on I had installed, and it didn't change. I even deleted both parts and recreated from a cube and... it still did it. 

      But I can't recreate the problem on a new file, so I'll just scrap the whole thing and start over. 

      I really don't know what I did, but I created a monster lol

      Thanks again :)

    • a
      amyeha replied

      If any are interested, I found what caused this! 

      I had to look into the bug section of 2.8 to find a few persons having this problem, and one mentioned the clip start value in the View panel. Mine was at 0.001 which for some reason caused a problem with the knife tool. After changing it to a higher value at 0.01+ the knife tool worked normally! So below that number cut tools might act funky, good to know!

    • Kent Trammell replied

      Ahhh very interesting. I was unaware of that issue with 2.8. Thanks for sharing your discovery! 🙇‍♂️

    • Keith (keithc) replied

      Appreciate you taking the time to figure this out.  If I have this problem, I know what to do now.  Hopefully BF is aware of this, and it's on the docket for future releases.

    • o
      option replied

      I accidentally asked something like this in the last part actually referring to this part. my knife is going through topology to opposite faces. im so going to try what you said. thanks for the hope in the ressurection of my treasure chest project. 

    • o
      option replied

      didn't work. when I checked my clipping threshold it was.1 m. I thought it was like backface culling type thing. I dunno. im gonna try to reset the prferences to default


    • o
      option replied

      started from a prior sage and tis corrected