by “to the game” do you mean the website? Or something else?
Another editor: yes for it to look correct any other editor needs to apply the UV transform that is stored in the glTF per object
It is what Felix and me mentioned above here Discord and Discord
Ok lemme try to explain, my English also sucks
by user 352162242961211404
So, I’m a modder, and what I’m doing is create a stage with light maps, and well u see this screenshot
by user 352162242961211404
Ok, in blender, the object looks fine, and in UV editor it looks completely wrong
by user 352162242961211404
But ok, i thought this was just blender being blender, so i exported this stage anyways with the new UV MAP, and when I import this stage, with the second new UV Map. Well…
by user 352162242961211404
In-game
by user 352162242961211404
The light map In the object is completely offset like it is on the UV Editor, out of place
by user 352162242961211404
But when I manually resized the UV MAP in X axis to the right, for it to look this this
by user 352162242961211404
In-game it finally was correct
by user 352162242961211404
But in blender it looked like this
by user 352162242961211404
Ignore the white meshes, just pay attention to the ground mesh
by user 352162242961211404
Ik I can resize the UV Map manually, so when I export the object I can be able to use it in-game, but some UVs are hard to fix, and I ofc if there was a way to prevent it from happening it would be nice and it would save me more time
by user 352162242961211404
@Marcel_Wiessler1 
I apologize for the trouble, I hope I was able to explain myself better know
by user 352162242961211404
Or well, maybe I’m missing any plug-in in blender?
Also u guys suggest any version of blender in specific for needle?
by user 352162242961211404
Ok I understand now 
May I ask again what “in-game” means here? What tool or game engine are you using?
What we can possibly do is adding an option to apply the UV offset (that we store in the objects data) and apply it to the UV. It would look like this then for example
