2.8 Texture atlas (missing feature)

[helluvamesh]

GYAZ Export Tools (Seamless Blender To Unreal/Unity (FBX))

Last Update: March 1, 2023 for Blender 3.4 Seamless Blender To Unreal/Unity Export The addon focuses on moving assets from Blender to Unreal/Unity making iteration painless using Blender’s default FBX exporter. Blender vs UE4 standards: Blender: -Y is forward, +Z is up, 1 unit is 1 meter UE4: +X is forward, +Z is up, 1 unit is 1 centimeter The addon expects assets to be correctly set up for Blender. Do not divert from Blender standards because the addon won’t work then, and it also breaks …

For this addon I wrote a modified uv panel that has the functions you mentioned along with reordering uv maps.

If you want to take a look at the code, it’s in mesh_tools.py
look for these operators:
BatchSetActiveUVMapByIndex
BatchSetActiveUVMapByName
BatchAddUVMap

You’re script fails because in 2.80 mesh.uv_textures got changed to mesh.uv_layers