Marvelous Designer is insane. It’s brilliant. It’s fast. The guys who designed and developed it should get a Software Innovation of the Decade Award. It’s rare you see software with that kind of innovation.
Anyway, back to the topic…
Personally, I think that ANY modelling of anything cloth-y requires a cloth simulator. It’s called “Dynamic Modelling”, where you simulate how a cloth responds to gravity, etc., using a simulator, then save out the resulting model as an .obj for whatever use you might have. The reason it’s so important is that it’s so freakin’ difficult/impossible to hand model anything that looks remotely like cloth that responds to a real environment (gravity, etc.) and that maintains the cloth’s internal parameters (folding, stretching, etc.).
Yeah, you can put folds in a mesh, but it’s almost impossible to put the correct size folds and stretches that correspond to the type of cloth you have. And people subconsciously know what kind of folds should appear in a bed sheet, but few modellers know how to describe it to themselves and reproduce it. Although if you’re like most people here, making stuff for others’ consumption is not much of a concern, but if you want to, at some point down the road, learn how to make models for an audience, this kind of stuff is critical.
And FWIW, I think it’s critical for anyone who’s any sort of modeller to have as one of his tools a cloth simulator. Luckily, Blender is free, and it has one. There are others out there also. It is so incredibly useful when you want to model anything that is cloth-y, like fabrics, sacks, bags, etc.