Hi. Long story short, you should watch a different tutorial ( just NOT
this one, too many mistakes ) because there are a lot of problems with the garment
Look for a tutorial where you are not told to download Blender 2.7. Always use maxis meshes as a guide for how things should be done. If the author says something that goes against how a maxis mesh is made ( "do not delete the body's uvs", "vertex paint with 00ff04", etc ), they are wrong and you should find a different tutorial bc they are most likely wrong about many other things.
- there is no need to include patterns when exporting the garment from MD;
- instead of importing obj in the new scene, clone something similar in s4s, export the blend, open it. Right now your scene has no body parts and it can cause problems;
- all parts of the body covered by clothing should be deleted. The uvs of your garment should go in the space where those delete uvs were. Right now they are extremely small and your textures will be of very poor quality
- the armpit area should be tighter. You can see in cas that the mesh doesn't look right in the chest area because of them;
- your garment has no proper uv_1;
- you are making a dress that should animate differently than the nude body, so you should be transferring weights and uvs from a dress of the same length;
- if you're making a full-body outfit, clone a full-body outfit. By starting from a top you will be introducing new bones which can cause problems;
- never clone nude body parts. They have a buff that can give the sim wearing the garment an embarrassed moodlet;
- when you hover over a garment in CAS, the area lights up to indicate that you can change the shape of it. The shiny jagged look on the skirt comes from the fact that the uvs are in the wrong place in uv_1;
- and no, the normal map is not right, check how any normal map of the full-body outfit looks like
- your garment is vertex painted by the wrong color. That color is meant for accessories;
Vertex paint dictates what variation (skin-tight and robe-like) of deformation maps the painted area will deform according to in CAS during body customization and animation.
00FF00 is for skint-tight areas, 3FFF00 is for any skirt-like area ( skirts, bottom parts of dresses, coats, aprons, etc).
Start by choosing 00FF00 and Paint - Set vertex color
1). Disable Limit selection to visible;
2). Holding Ctrl, lasso-select the bottom part of the mesh starting somewhere in the middle of the pelvic bone;
3). Enable sync;
4). Press B and deselect legs;
5). Switch to Vertex paint and enable Face selection masking for painting;
6). Type in 3FFF00;
7). Paint - Set vertex colors;
8). Press A twice to deselect and select everything again, Paint - Smooth vertex colors