Thanks for the compliments =)

I'm still "learning" maya too, and I have no real knowledge about this soft or 3D modeling.
I played with 3D Studio MAX (yes the old 3ds, 15years ago, before being rewritten by autodesk).
I also played with metasequioa for Illusion game modeling, and that's all.
To be honest, I think that maya is a real pain, and I don't understand how it could be a "standard in 3D modelling", even the simpliest thing like mirroring is a pain.
(if someone here can explain how you can make "reflection" work after removing half of your mesh, then duplicate/duplicate special/mirror cut or mirror geometry, then combine, you'll have my gratitude for thousand years. I searched on forums for hours without succes)

So !
First thing, every time you want to do something, search on the net. It could be possible (but awfully unintuitive) or just impossible without writing a 2pages scripts (and I don't know how they work)).
What I did for XSP took me HOURS, I'm sorry, but I'm not a magician, it's jsut hard work, with A LOT of try and fail :p
I provided my meshes of the lingerie set, you'll understand better how it's done than a long explanation. (I will release the knee socks too, you'll see how many meshes I kept, just in case my tests could fail).

Advice :

• Read the wiki, even if read diagonally, you'll learn the basis. (everything about import import/test ingame is written here)
• always work with symmetry when doing symmetrical clothes (reflection in maya), it will be easier to make the UVs.
• Like I said in an other post, for UVs, try to work symmetrically too, select right/left together parts when scaling, unfold left part, do the same on right part... in the end, work only on one side, then flip the other side, make them overlap, use the "snap to vertex" tool to make them perfectly match, reflip your slide, work done !
• you probably saw some of my previews pictures, work with a custom uv map before texturing
• don't forget that xsp want quads, not triangles. There are some tricks to enlarge your mesh (passing from 4 rows to 8, picture below), but in many cases, it could lead to unwanted behavior in game. Try to not use this trick. IF I had to redo my lingerie set, I'll probably delete those tricks parts.
• try to keep your vertices at equal distance from each other, or the game engine will move them to compasate the stretching.
• Collision detection will work better with a wide cloth than a tight one, I started with hard to make clothes, probably not a wise choice to begin with.
• Interactive split tool can be use (and it works) but you have to reproduce the symmetry each time, don't forget it.
• extrude tool is good too, but there are some steps to follow. Select the edges you want to extrude AND it's reflection, uncheck "refkection", click extrude, press "w" (move tool), move a little in a way wich won't break your symmetry (generally Z or Y), check "reflection" again, unselect half part of your edges (or you won't be able to move them) now you can move your edges /vertices symmetrically without maya bugging in chosing the reflection.
• when you need to merge vertices, always use "edit mesh -> merge to center", reproduce to mirror part.
• Backup your .ma or duplicate your mesh (especially before merging/ splitting) , I encountered some weird bugs where my mesh was broken ingame... -_-
• mesh needs to be more detailed where it will be streched to avoid "immediate" "passing through body" after the first girl movement (knees, elbows, between legs).
• in xsp "test mode", before saving the cloth state, be sure that no parts are already stuck inside the body. look everywhere, try to pull cloth where you have doubts
• your render mesh will try to match your bind mesh, wiki tells to shrink the (entire) bind mesh, this way it will fit the body shape when launching test mode. but sometimes keeping the whole cloth at scale is not a good idea. Imagine a schoolgirl skirt, you want the "belt" to tighten the waist and the rest of the skirt to be near the body without tightening it.
  2 options :
  - make a larger skirt than your model, with a closer "belt", when shrinking the whole bind mesh, the skirt will approach the body, the belt will be lesser than the waist, it should work.
  - make your skirt on your model as you want it to be, shrink your bind mesh very little (maybe 0.9). then, select only the belt part on your bind mesh and shrink it more. this will simulate the belt as un "elastic part" far smaller than the rest of the skirt and it should work too.
  - bad idea, make a skirt that match perfectly your final needs. downscale the whole bind mesh. now you have a tight skirt...

I'll also try to make a small video on how I did my knee socks. for the example

ps : wall of text hit you for 500k dmg.. sorry !

Sounds silly, but how do the shoes work? Should it not have the same problem with collision with the floor? Maybe a sock with a (more) solid sole would mitigate the issue.
I am a newb to maya, so I don't know if it is feasible and if it would help, just adding my two cents.

shoes seems to be objects rigged to body (feet), not a cloth. So, no collision detection etc... they just reproduce the same movement as the feet.

I see. That is why they can be removed only from the menu.Which means that rigging the socks the same way would make them act like the stockings on Monica. Nice for eyecandy but with no substance for gameplay.

@laissemoirire could you update /fix the feet issue with meshes ?

hummm I'm not sure that's possible without working on character hitbox, xpadmin talked about it somewhere, but I didn't see a tutorial about that after 3.5 release.
Also, to be honest, I currently have no time for modding. If I had, I would have released other cloth mods since July.

@laissemoirire sure
@xpadmin is it with 3.5 now possible to solve this problem?