Has anyone ever ran into this problem while unioning?

[Alteirn (Aetherius)]

Never seen this before but it has just happened when unioning a few brick parts.

Pre-Union; Screenshot by Lightshot
Post-Union; Screenshot by Lightshot

As you can clearly see unioning these parts somehow manages to move the middle piece towards the right.

I did the same thing with another section to no avail, the result remained the same.

Pre-Union; Screenshot by Lightshot
Post-Union; Screenshot by Lightshot
NOTE: Only unioned the bottom layer of the build.

I tried unioning a few other things, they worked out fine however. Any ideas?

[Scottifly]

I overlap my Parts by .01 to get rid of that issue. I haven’t seen it that obvious before, usually just .001 stud or so.
Either that or don’t Union Parts together, just Negate the corners off for something like that first example.

Maybe it has something to do with floating decimal errors for Position of the Parts?

I tend to go with the Negating option. Sometimes with adding Parts to each other, even if you get the edge to edge surfaces lined up or overlapped, the flat “top” surface still produces a visible line because the 2 Parts aren’t at exactly the right level.

You can fine tune Position by using .0001 stud increments in the Properties window, but it isn’t visible unless you are right next to the Union or the light shines off it just the right way.

[Alteirn (Aetherius)]

Problems persisted while overlaping parts. Problems persisted while using negating instead. Despite resizing multiple times it still puts it off. Never seen anything like this before.

[Scottifly]

You didn’t go into your Studio Settings and toggle off the CSG2 setting did you?
Or use Unanchored Parts?

[Veldaren]

Try this:

One simple way to solve some CSG errors

Many CSG errors happen when a brick is not placed correctly in relation to the other brick. There is this Floating point thing, that makes part positioning imperfect, meaning that 0.000xxx changes appear, especially when the part is away from the middle’s 0,0,0 point and by moving it too much. Then the Studio cannot read it as it can read only to the third digit after the comma. This quick tutorial will help you keep your builds without errors, by fixing the parts position, as some of you may al…

[Intended_Pun]

That’s intended behavior. The new CSG system offsets parts by a small amount to prevent any errors from happening.

With that being said, you could probably move the model a bit and then union it. Then the offset might put it in the right spot again.

[Alteirn (Aetherius)]

@Scottifly

You didn’t go into your Studio Settings and toggle off the CSG2 setting did you?
Or use Unanchored Parts?

No and no.

@Veldaren

Try this:

One simple way to solve some CSG errors Community Tutorials

Many CSG errors happen when a brick is not placed correctly in relation to the other brick. There is this Floating point thing, that makes part positioning imperfect, meaning that 0.000xxx changes appear, especially when the part is away from the middle’s 0,0,0 point and by moving it too much. Then the Studio cannot read it as it can read only to the third digit after the comma. This quick tutorial will help you keep your builds without errors, by fixing the parts position, as some of you may al…

Did not work, any other suggestions?

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An additional problem seems to have surfaced.

I was attempting to make a bowl from unioning through negation however it seems be all kinds of messed up.
I go about it the regular way, starting with a single sphere; Screenshot by Lightshot
I then copy the sphere and resize it by .125 on all sides with the intent of negating it to make the sphere hollow; Screenshot by Lightshot
When I try to make the inner sphere a negative part it moves itself slightly, offsetting as you all are saying. So I undo it, copy the position of where it was supposed to be at, and paste it when I make it a negative part again so that it is in the center of the sphere I want to make hollow. When I finally union the inner sphere(negative part) and the outer sphere, this monstrosity presents itself before me…; Screenshot by Lightshot

At this point, I’m at a loss. Absolutely baffled. So I undo to before I union both parts and I move the outer sphere to unveil the beast; Screenshot by Lightshot

Now this, I can say with a indisputable degree of certainty, is something I have never seen before.

[Intended_Pun]

You could try it with CSG V1. No idea how that would go.

I would also try making these in a new place file… It could be something weird with your current one.

[Alteirn (Aetherius)]

Just tried it at a few other places, the results are the same. The results are a little more tame but still problematic; Screenshot by Lightshot | Screenshot by Lightshot

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Disabled CSG V2, it solved the sphere problem. However it wont even let me union the set of bricks I was having my initial issues with. It wont let me union every part without; Screenshot by Lightshot

[Intended_Pun]

It sounds like a bug. You should report it.

[Alteirn (Aetherius)]

It is. [SOLVED] CSG Causing malformed shapes and physics? - #9 by linearcomplex

linearcomplex had the problem resolved.

Thanks to everyone who tried to help resolve the matter.