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When subdividing I get a giant crease down the middle of my models face. I'm relatively new to 3D modeling and would appreciate any help that is given. I have a mirror modifier and subdivision modifier on. I'm not sure what other information I would need to give. If more information is needed please let me know. Thank you for anyone that helps.

This is when the model isn't subdivided. not subdivided Yosh

this is when it's subdivided

Subdivided Yosh

Silent Serenity
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    hello, maybe you have inner faces or overlapping vertices? Have you tried a Merge by Distance? Please share your file: https://blend-exchange.giantcowfilms.com/ – moonboots Nov 01 '20 at 09:40
  • Hello :). My bet is on flipped faces: Inaccurate Shading on Object – jachym michal Nov 01 '20 at 10:05
  • Sorry about the late response. I also go to school full-time and work. How do I share my blender file? unless, I upload to google drive then you download from there. I have tried merge by distance...It didn't work sadly. And hello ^_^

    The normals needed to be recalculated! Thank you for your help! Now I just have to clean this mess....

     – Silent Serenity Nov 02 '20 at 08:52

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Credit goes to Jachym Michal

"Hello :). My bet is on flipped faces: Inaccurate Shading on Object – Jachym Michal 22 hours ago"

It's in the comments, just recalculate normals to face outside, a (selects all) -> Shift-N

Silent Serenity
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