Updating UVs on a surface behave differently between v4.1.2 and v4.2-beta3

[nikywilliams]

Godot version

v4.2.beta3.mono.official [e8d57af]

System information

Godot v4.2.beta3.mono - Windows 10.0.19045 - Vulkan (Mobile) - dedicated Radeon RX 580 Series (Advanced Micro Devices, Inc.; 31.0.21031.1005) - Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz (12 Threads)

Issue description

On v4.1.2 I was working on a process to combine all static meshes (glb) into 1 in order to improve performance. Additionally, each mesh needed to have their UVs adjusted so it could utilize a single material more efficiently. This involved collecting a list of surfaces, adjusting vertices, normals, and UVs, and then adding the surfaces back to a new ArrayMesh.

This had been working fine in v4.1.2, but after upgrading to v4.2-beta3 I noticed all the colors were not correct.

I did notice that once I ticked the "Force Disable Compression" box on the mesh import, that it appears to be working again in v4.2-beta3.
Is this possibly related to bug #84270?

Left side is v4.1.2 and the right side is v4.2-beta3

I've attached a zip which contains a very minimal project for both v4.1.2 and v4.2-beta3 that only focuses on the UVs. Line 11 is where I'm setting the Scale and Offset for the UV on the mesh.

Steps to reproduce

See attached projects

Minimal reproduction project

godot.zip

[AThousandShips]

Please try beta5, several issues has been solved in the last weeks, this looks like one of those

[nikywilliams]

Understood, I'll try the updated beta and report back when I'm able.

[AThousandShips]

In the future make sure you have an up-to-date version when making a report :)

[clayjohn]

This is most likely fixed by #84159 which is included in Beta4 and Beta5.

[nikywilliams]

I can confirm it is fixed in a later beta. Will close this issue.