OSnaps not working specifically when mirroring.

[qazzapatol]

This issue is happening regardless of which file I have open. I’m working with 3D objects and OSnaps are working flawlessly when drawing a line, moving objects, etc. but as soon as I try to mirror an object OSNAPZ appears to toggle on and project my OSnaps onto the UCS plane https://routerlogin.uno/ . I have tired setting OSNAPZ to 1 and back to 0 but that hasn’t helped.

[Valentin-WSP]

@qazzapatol ,

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@qazzapatol wrote:

... I’m working with 3D objects ...

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Try using MIRROR3D (Command).

• AutoCAD 2024 Help | To Mirror Objects in 3D | Autodesk
• Autodesk Civil 3D Help | About Using Object Snaps in 3D | Autodesk

[imadHabash]

Hi,

Object snaps function the same way in 3D as they do in 2D with the exception that they can optionally be projected.

By default, the Z-value of an object snap location is determined by the object's 3D location. However, if you work with object snaps on the plan or top view of a 3D model, a constant Z-value is more useful. If you turn on the OSNAPZ system variable, all object snaps are projected onto the XY plane of the current UCS or, if ELEV is set to a non-zero value, onto a plane parallel to XY plane at the specified elevation.

How about using 3DOSNAP ( F4 ) ..

[Kent1Cooper]

Help for [ordinary] MIRROR says it pretty clearly:

The two specified points become the endpoints of a line about which the selected objects are mirrored. For mirroring in 3D, this line defines a mirroring plane perpendicular to the XY plane of the user coordinate system (UCS) containing the mirror line.

That's why the second point must lie in the XY plane of the first one, meaning the equivalent of OSNAPZ being turned on.  And it's why you need to use MIRROR3D if you need otherwise.