[Solved]Mesh looks fine in blender but not in S4S or in game

It shows like that because the UV map is wrong.

This is your mesh's uv map-


This is your texture-


You can see they do match, which means the reason it doesn't work in s4studio is because the mesh is probs an older version you imported where the UV is different.
The mesh hasn't updated to the newest because the cut numbers are different to what the original item you cloned uses (the number of s4studio_mesh_1 / 2 / 3 you have and their cut numbers).

The easiest way to fix this is by starting again lol.
Make a new package and clone the male 'nude' top.

This top is good because it only has 1 meshgroup/cut so it makes life easier.
Then in your .blend delete s4studio_mesh_6 because it has the cut number of 0004.

And you can keep s4studio_mesh_1 the same as it's cut number is 0000 and that's the only number the nude top uses.

Now you can import the .blend and texture it should show up, hopefully that's not too confusing :P