blender · HeyBraza shows you
blender mirror modifier not working
HeyBraza points at the mirror axis buttons, the clipping checkbox and your object's origin so the halves actually meet.
the mirror modifier reflects across the object's origin, not the world centre or your mesh's middle - so if the origin is off, the mirror lands somewhere strange. that plus the wrong axis explains almost every 'mirror not working'.
or do it yourself
- 1check the origin first: in object mode, right-click > 'set origin' > 'origin to 3d cursor' after snapping the cursor (shift + c) to the world centre.
- 2add the modifier: modifier properties (wrench) > 'add modifier' > 'generate' > 'mirror'.
- 3under 'axis' pick x, y or z - the wrong axis is why it looks like nothing happened.
- 4tick 'clipping' so vertices can't cross the mirror line and leave an overlapping seam in the middle.
- 5delete the half you're mirroring (edit mode, box-select it, x > vertices) - otherwise the original and the mirror sit on top of each other.
let HeyBraza do this with you
HeyBraza is a tiny on-screen guide that points at the right buttons and talks you through it, on windows and mac.
downloadcommon questions
why does the mirrored half sit far away from my model?
the object's origin isn't on the mirror line - move the origin to the centre of the model and the halves meet.
my two halves have a seam down the middle - how do i weld them?
turn on 'clipping' in the modifier, then merge the centre vertices (m > 'by distance') once you apply it.