I’ve finished modeling the edge of the sleeves and the bottom of the dress, I also made the underside “caps” for it (to prevent the outfit from looking one-sided), I also had to do some fixing on the left sleeve, I had forgotten that it wasn’t matching the high-resolution model at all because of the mirroring. I also marked the “T” seam on the shoulder, on each side.
I did a very quick texture unwrap on the section of the mesh that contains the… “side boob”, shoulder, and sleeve just to see how it’s done and to have a go at baking textures. Blender makes this step a little strange, but not entirely unpleasant. It’s a different workflow from 3DsMax. You can see the result in the “textured” picture, the bib is still the HD version, and you almost cannot tell the difference, beside the apparent pixelation.