So I packed my model, since it was long I made it 2x2k (4096x2048) but when I import the model into marmoset and set the bake res to 4096x2048 it just takes the first square and stretches it to that res, any one have any ideas on why? Thanks.
your uvs dont fit into 0-1 space so you'll only see half of them
squash the uvs horizontally so they fit and itll work
the 0-1 space is relative to your texture. atm you are using 2 UVspaces. 0-1 and 1-2
if yyour UVs are squashed by 50% like poopipe described, just make your texture 200% wide and a pixel is square again.