Hey so i have run into this problem where my UVs are looking different in Maya than they do in substance painter.
This is my object is is triangulated if that helps.
These are my UV's i have just used an automatic map.
But when i export as FBX and import into substance painter my UVs look like this
My FBX file if needed is attached
Replies
UVmap_0
LightMapUV
map1
You the map you want to use is the map1.