Meshes Randomly Rotating on Client

[MrOnlyKemal]

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Mesh Rotates On Client

I have created a hotdog mesh from an svg file i found on the internet and i imported it to studio. The mesh looks fine in scene. But when i run the game it rotates to a different position. And only rotates locally, when i go into server view it shows as normal Studio View: [image] Client View: [image] Server View: [image] The parts are anchored and i don’t know what causes this

I imported an fbx file that i made in blender. I downloaded a .svg file and basically just converted into a mesh in blender. Now when i imported the mesh, it looked fine. But when i run the game it rotates like 90 degrees and only on the client.

Here are some images of the problem

Studio View:

Client view when the game is running:

Server view when the game is running

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I do not have any scripts that change rotation, the mesh parts are anchored, theres no local script affecting. This also happens on empty places, if i open up a baseplate, anchor the mesh and run the game, the same issue still persists

Here are the files if you want to test it for yourself:

HotdogStand.rbxm (110.9 KB)

Example place:

example-place.rbxl (161.4 KB)

[thirdtakeonit]

Thanks for the report! We’ll follow up when there’s any update on the issue.

[subcritical]

This happens because the part’s cframe isn’t a valid rotation (it’s inverted). You can fix it by running this in the command bar:

local part = workspace.Curve
part.CFrame = CFrame.fromMatrix(part.CFrame.Position, part.CFrame.XVector, -part.CFrame.YVector)

Servers use the exact cframe that’s saved in the place file. 12 numbers; 3 for translation and 9 for rotation. Meanwhile, clients reconstruct that cframe from a tiny compressed quaternion.
What you’re seeing is that the CFrame is getting “corrected” by the compression and forced to be un-inverted.

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Can you supply the original .fbx (and the exact steps you used to import it) so we can make sure the importer isn’t importing bad cframes?

[MrOnlyKemal]

Yes, i solved it by running the command 2 times. But the lighting of the object became really weird, there’s no shading on the object anymore.

This is the .fbx file that i used:
hotdogstand.fbx (72.9 KB)

[subcritical]

Check your mesh normals and make sure they aren’t flipped!

[MrOnlyKemal]

The normals look fine in blender.