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I'm using the last version of blender (2.9) on a new mac book pro. I'm trying to use the snap to face but when I move the obejct is snapping to the inset faces. I've checked all the face's normal and there are all aligned correctly. The backface culling is checked. I've tried with all settings but still not working.I've tried also to flip normal and to rotate first the object 180 degress but the problem persist.

All normals are ok

All normals are ok When i move the object on the face is flipped 180 degrees

When i move the object on the face is flipped 180 degreesThe object is snapped on the inside faces

The object is snapped on the inside faces

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    $\begingroup$ Hello :). Face snapping works with Z+ orientation of objects. You need to flip your mesh upside down (in edit mode) to make it snap correctly. Or just flip it after the snapping. $\endgroup$ – Jachym Michal Oct 1 at 14:46
  • $\begingroup$ Thank you so much! Is there a function for do it automatically especially if you have an object with a lots of parents already setted? $\endgroup$ – GGKMNTN Oct 1 at 19:57
  • $\begingroup$ Hey :). I'm not sure what you mean. Object with many children? Rotating a parent mesh in edit mode doesn't affect the children. Please expand... :) $\endgroup$ – Jachym Michal Oct 1 at 20:16
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    $\begingroup$ I mean if there's a automatic function to align and fixed this without manually flip the obejct, in this case the object had just one parent, the bolts, so after I flipped the "disk" I had to recolocate the bolts, easy here that I have just two object parented but what if I had more objects parented and already positioned? Thank you so much for your support it worked!!! $\endgroup$ – GGKMNTN Oct 7 at 10:37
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Snapping works with Z+ orientation, so just flip the origin point upside down.
To keep the parented objects in place, you can choose to only affect the parent.

  1. Select your object
  2. Go View > Affect Only > Origins and Parents
  3. Rotate the Origin by 180°

enter image description here

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  • $\begingroup$ Wow!!! That's what I needed thank you so much! How you can upload this animation? Is that a GIF? You do that with photoshop or there's something in Blender to do that? BC I think sometimes is better this then upload N images... Thank you!!! $\endgroup$ – GGKMNTN Oct 7 at 11:13
  • $\begingroup$ Hey :). I use Licecap for the gifs. It's free, fast and easy to use. $\endgroup$ – Jachym Michal Oct 7 at 11:16

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