It might make sense to consider cursor rotation for 'Snap Selection to Cursor' but I don't think the origin itself has a rotation, so I wouldn't classify this behavior as a bug.

If this turns out to be really a bug I can work on it. For linked objects I would suggest to rotate them as well according to the set Pivot Point.

From a user point-of-view It seems logic to have origin axis rotated as 3D cursor. Since there's no other direct option to do that.

Imagine situation, where you import 3D Scan of an object that's off axis and rotated.

The only way to set origin to some flat surface now is:

1. Project 3D cursor to rotated object geometry
2. Create Empty object
3. Set Transform Orientation to 3D Cursor
4. Select Empty object and go to Object > Transform > Align to Transform Orientation
5. Parent rotated object under the Empty with "Keep transform"
6. Reset empty rotation and position
7. Clear Parent for rotated object (and keep transform)
8. Select Rotated object and go to Object > Apply > All transforms

@Habib Gahbiche (zazizizou) it is not really a bug per se. It's more a consistency in the UI. Now that we have rotation on the 3d cursor. It would be logical to at least have the option to use it for snapping.
If you want to make the snapping take into account the 3D cursor rotation, then by all means do so! :)

@Jacob Max Fober (Fubax) I'm not sure how Set Origin to Cursor would solve your problem. You could just clear rotation and location after importing if the information is there, otherwise you'll need to do something like

1. Go to edit mode
2. Select some flat surface
3. Snape Cursor to Selection
4. Go to object mode
5. Set Origin to 3D Cursor.

These steps don't change the rotation of the object though, but your suggestion of Set origin to 3D cursor would.

@Sebastian Parborg (zeddb) ok thanks. I agree with snapping so I'll start working on that :)

While I agree it would be nice if it were added, I am not sure we can really call it a bug - it's just a missing feature of the snapping operator.

@Habib Gahbiche (zazizizou)
Well with Set Origin to Cursor accounting for cursor rotation the process would look like:

1. Select Cursor tool (make sure Surface Project is enabled it the Top Bar)
2. Click on some flat surface
3. Set Origin to 3D Cursor

@William Reynish (billreynish)
I understand your point of view. I'm not sure either if it's really a bug =) Maybe new category (not real bug)

While I agree it would be nice if it were added, I am not sure we can really call it a bug - it's just a missing feature of the snapping operator.

From the user's point of view, most of us would certainly think aligning with the cursor
and ignoring the cursor rotation is a bug.

The same problem is when you add a new object. Anyone I asked would expect the
new object to be aligned with the cursor (unless he chooses the "Align to View" option).

In T63470#668136, @Martin Capitanio (capnm) wrote:

While I agree it would be nice if it were added, I am not sure we can really call it a bug - it's just a missing feature of the snapping operator.

From the user's point of view, most of us would certainly think aligning with the cursor
and ignoring the cursor rotation is a bug.

The same problem is when you add a new object. Anyone I asked would expect the
new object to be aligned with the cursor (unless he chooses the "Align to View" option).

This refers to snapping and not setting the origin to 3D cursor. I think we all agree on that.

@Jacob Max Fober (Fubax) ok I thought by flat surface you meant a face of your object. However I still think that setting the origin to 3D cursor should not change the object's position or rotation (so keep the current behavior) and instead change snapping to consider cursor rotation.

In T63470#669238, @Habib Gahbiche (zazizizou) wrote:

(...) (so keep the current behavior) and instead change snapping to consider cursor rotation.

Yes, that's exactly what I had in mind. Thanks

PS: Maybe idea for another tool:
Move Origin, while geometry stays stationary in World Space.

I submitted a patch that handles snap selected to cursor in object mode: D4897. Also feel free to leave some feedback on blenderartists

I can't believe we're in 2022 and snapping a bone or an object to the 3D cursor doesn't affect it's rotation.