Another UV Meshing Question - Blender 2.79b

Hi.
"UV mapping" is a process of defining how an image is projected on the surface of an object. "UV map" is a specific way it can be projected, not an image itself. So, this is not UVs related problem.
This is related to either material or baking settings, cannot tell what exactly since the file does not look the same way it did when you baked the texture.

If you want to bake with cycles, you need to look up a tutorial on this subject ( or follow this ) because it is done differently than in Blender render. If not, delete this material and bake it like this
How an object looks in MD does not translate to Blender, there is no point in creating materials there

Unrelated issues:
- uvs created in the square uv space stretch when rectangular textures are applied. You must bring them to their original shape before re-arranging. Select uvs, assign an image to the background, press S Y 0.5, only then move them;
- you should not rotate uvs freely, it will worsen the quality of the baked image and make it harder to apply patterns. Rotate them only by 90 degrees;
- dresses are vertex painted with two colors, just transfer vertex paint from the reference;

For the future:
- it is best to not use Remesh in MD, it only makes things worse;
- a dress like this does not need to be so high poly. You can just make a low poly version in quads and bake textures to it from a high poly version. This tutorial shows how to do this, you just bake ambient occlusion the same way;
- when you create high poly meshes, subdivide an avatar as well;
- when you bake textures, there should be a body in the scene and preferably a floor plane, this way the image will have more shadows and look less flat;
- you do not need to use that template for uv_1. Once you apply data transfer modifier, it is done