actually, it’s pretty easy just take a plane give it a cloth modifier
make a cube scale in the z-axis
give it a collision modifier
note: give the plane a subsurf modifier at simple
crank the viewport in the subsurf modifier to 6
apply the modifier
and you get a beautiful cloth simulation shade it smooth go frame by frame to which frame you want it to be a model
after you found the frame apply the collision and cloth modifiers
and finished bed
if you want give it a texture
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