I don't know how to fix my mesh

Hi. Sorry for my english, not a native speaker.
I created a mesh for a game. In blender mesh looks solid but in game it’s splited on seams exactly where I used ‘bisect’ on faces. Doubles are removed. I understand I did something wrong but I cannot understand what. Maybe someone knows where I messed up and how can I fix it?

You mean the white streak?? This looks like edgebleeding on the UVs… is the background white ?
( And why showing without texture in belnder ??)

The white streak it’s texture of his second sleeve. Because mesh is separated there you can see through it.
And textures I turned out in blender because it’s easier to see that there are no separation between elements.

So… what actually is the problem ?? This is a little contradictory…

but also:

Separated or not separated… ? It can’t be both, can it ?!

Also:

… so they are overlapping ? ( → Z-fighting )

You might want to divest the important part and just upload an exampe blend file… ??

I don’t know because I don’t have any information
Check if it’s the same problem as the link. :slightly_smiling_face: