Metaball Assembly Mirroring Problem #73007

New Issue

David O'Neil · 2020-01-09T19:34:50+01:00

David O'Neil commented

2020-01-09 19:34:50 +01:00

Blender Version
2.81a

Exact steps for others to reproduce the error
With the attached file I can't see any way to mirror the metaball assembly without having the individual metaballs weirdly rotated. All I'm trying to do is mirror it to make it into a left hand instead of a right hand. If they are solidified into real objects first, then they can be mirrored correctly, but that isn't the desire. It would be nice to be able to mirror it as a metaball assy, then pose it, then turn it into real objects, join them, remesh them, and start sculpting.

Thanks

**Blender Version** 2.81a **Exact steps for others to reproduce the error** With the attached file I can't see any way to mirror the metaball assembly without having the individual metaballs weirdly rotated. All I'm trying to do is mirror it to make it into a left hand instead of a right hand. If they are solidified into real objects first, then they can be mirrored correctly, but that isn't the desire. It would be nice to be able to mirror it as a metaball assy, then pose it, then turn it into real objects, join them, remesh them, and start sculpting. Thanks![MetaHand.blend](https://archive.blender.org/developer/F8267729/MetaHand.blend)

David O'Neil commented

2020-01-09 19:34:50 +01:00

Added subscriber: @renaissance_man

Sam Brubaker commented

2020-01-10 00:14:13 +01:00

Added subscriber: @rocketman

Sam Brubaker commented

2020-01-10 00:14:13 +01:00

Changed status from 'Needs Triage' to: 'Archived'

Sam Brubaker closed this issue

2020-01-10 00:14:13 +01:00

Sam Brubaker self-assigned this 2020-01-10 00:14:13 +01:00

Sam Brubaker commented

2020-01-10 00:14:13 +01:00

I have inspected the your file. The "weird rotation" you see when you attempt to mirror the metaballs is the result of the practical problem of mirroring any object that has a non-zero orientation (it can't be done in global space). As such, this is not a bug.

Apply the rotation of the metaballs before mirroring and you will get a more appropriate result. Rotate your capsules in edit mode next time.

I have inspected the your file. The "weird rotation" you see when you attempt to mirror the metaballs is the result of the practical problem of mirroring any object that has a non-zero orientation (it can't be done in global space). As such, this is not a bug. Apply the rotation of the metaballs before mirroring and you will get a more appropriate result. Rotate your capsules in edit mode next time.

David O'Neil commented

2020-01-10 00:42:52 +01:00

is the result of the practical problem of mirroring any object that has a non-zero orientation (it can't be done in global space).

Of course mirroring something with a non-zero orientation in global space results in the correct mirroring I am trying to achieve. To see that for yourself, open my file, box select all the metaball groups, convert them to meshes, apply all transforms to those objects, then mirror them. They will be a model of the opposite hand, and won't be messed up like just mirroring the metaball versions results in.

The problem with mirroring the metaball assembly version would be (or should be) fixed by being able to apply all transforms to the metaball assembly items. But if you try to do that, all of the items disappear (when applying the scale), which is definitely a bug.

> is the result of the practical problem of mirroring any object that has a non-zero orientation (it can't be done in global space). Of course mirroring something with a non-zero orientation in global space results in the correct mirroring I am trying to achieve. To see that for yourself, open my file, box select all the metaball groups, convert them to meshes, apply all transforms to those objects, then mirror them. They will be a model of the opposite hand, and won't be messed up like just mirroring the metaball versions results in. The problem with mirroring the metaball assembly version would be (or should be) fixed by being able to apply all transforms to the metaball assembly items. But if you try to do that, all of the items disappear (when applying the scale), which is definitely a bug.

Sam Brubaker commented

2020-01-10 01:15:13 +01:00

The problem with mirroring the metaball assembly version would be (or should be) fixed by being able to apply all transforms to the metaball assembly items. But if you try to do that, all of the items disappear (when applying the scale), which is definitely a bug.

I see this issue in your file. This disappearance happens because your meta objects are quite small relative to the global scene, and will not be visible unless you adjust the resolution values to compensate. After applying the scale, try these values:

> The problem with mirroring the metaball assembly version would be (or should be) fixed by being able to apply all transforms to the metaball assembly items. But if you try to do that, all of the items disappear (when applying the scale), which is definitely a bug. I see this issue in your file. This disappearance happens because your meta objects are quite small relative to the global scene, and will not be visible unless you adjust the resolution values to compensate. After applying the scale, try these values: ![Untitled.png](https://archive.blender.org/developer/F8268002/Untitled.png)

David O'Neil commented

2020-01-10 03:18:46 +01:00

Thank you. An issue that appears is when that is done the metaball of the palm area changes shape when the transforms are applied. Is there a workaround for that, or is it a bug? I don't really care at this point, because I've learned a bunch, and can make it work, but the perfectionist part of me is still a bit bothered.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Metaball Assembly Mirroring Problem #73007