LuxXeon I actually did use a simple repeating texture, no UV, but I think the topology is bolloxed up enough that I may just try making my own shirt from scratch. Or start from a cleaner mesh. This one was flaky from the start.

Hi.  Yes, clearly the topology here could be improved; as jestmart mentioned, there's a lot of tris, and ngons that don't seem to make sense for the object.  Tell me, when you say "no UV", do you mean there are no UV coordinates assigned to this object at all, or just that you didn't use a UV template to paint the textures?  I think there must be UV coordinates of some kind, or even a seamless tiling pattern wouldn't appear as it does here.  You would likely get the same results you see in the shoulder area, throughout the entire object.  I think you would be able to fix the appearance if you edit the UV's, but I think creating your own mesh from scratch will give you much more predictability in the end.

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