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I want to make a plastic bag with crumples and appropriate mesh folding, to look something like this:

...and interact realistically with other forces such as force fields, having objects put into it: ...or in my case, folding it around a trash bin:

So does anyone know how to achieve such result in Blender? Never really seen this be done before :P. Thanks.

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    $\begingroup$ Maybe a texture for the folds and bumps in rest position, and maybe a cloth sim to get the physics right for the stretching and key frame the effect of the texture, so that it dissipates at full stretch. $\endgroup$ Commented Jan 31, 2017 at 15:10
  • $\begingroup$ That doesn't really clarify much, the texture needs to displace, stretch, crumple and generally behave in a very specific way. The cloth simulation needs to be perfectly well set for it to work right. That's the thing I was asking an answer for in the first place. $\endgroup$
    – Wiirexu
    Commented Jan 31, 2017 at 16:35
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    $\begingroup$ I've sculpted hires before of the bag I have made and used it to bake a displacement map and normal map to affect the lowpoly model of the bag. I then used physics and cloth sims to get the low poly to stretch and then I keyframed the value of the displacement texture down at the point of full stretch. $\endgroup$ Commented Jan 31, 2017 at 16:41
  • $\begingroup$ That makes more sense now that I think about it, but if the bag stretched in only one point then turning the whole displacement down wouldn't really work, unless there is a way to tell the value where the stretched points are and where they are not. $\endgroup$
    – Wiirexu
    Commented Jan 31, 2017 at 17:02
  • $\begingroup$ Maybe check this option: blender.stackexchange.com/questions/32043/… you could paint randomly to have some stiff parts as folds. $\endgroup$
    – cgslav
    Commented Jan 31, 2017 at 17:26

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