blender sewing cloth 1

download human model @ https://free3d.com/3d-models/blender-human

add armature, add parent to each bone which is the adjacent bone

vertebrate is the top parent 

select human model, then select bones, ctrl + p -> weighted object

rotate arm to level

add a plane, ctrl + r to loop cut

delete extra faces

e to extrude to the back

open up faces for neck arms and leg by deleting them

select rest of the faces on the sides, x -> face only

set collision to human body, change thickness to 0.0001

set cloth to shirt, increase quality to 10, enable self collision

change distances to 0.001, decrease shrink factor to -0.2

shape -> enable sewing

run simulation, apply cloth modifier

g to move shallow surfaces so that no skin is exposed

g to move the corners under armpits

add subsurface modifier. s to scale waist and sleeve perimeter

in sculpting mode, shift + click to smooth surfaces

use pinch, expand... to smooth shirt

g to move sharp edges inside

select edges on gap, f to fill

reference:

https://www.youtube.com/watch?v=5t2WQJMoQDM

human model

https://free3d.com/3d-models/blender-human

bone rigging

https://chuanshuoge3.blogspot.com/2022/10/blender-rigging-1.html