04-05-2019, 11:36 PM
Thanks for your scene file, I'll take a look at it.
Although negative inflate values don't really translate to negative pressure the way you might intuit...I mean, it equates to some form of pressure from the outside of the cloth, but not the type of vacuum inside the cloth that shrink wrap would need.
For a shrink wrap effect, what you actually want to modify is the "bias" value of your cloth bindings. A value less than 1 means that after initialization, the solver will think that all of the bindings should be shorter than they are, and will effectively pull them all inwards to compensate.
So if your cloth is composed of bindings that are 1.0 units in length and you set bias to 0.5, the solver will think the cloth has been stretch x2 and will shrink down. Same goes for the inverse....set bias to 2.0 and the cloth will blow up (without internal forces, just expand as it thinks it has shrunk down).
So proper bias settings are important for shrinking/expanding effects. Good for garments too, if you want to simulate tight seams.
Although negative inflate values don't really translate to negative pressure the way you might intuit...I mean, it equates to some form of pressure from the outside of the cloth, but not the type of vacuum inside the cloth that shrink wrap would need.
For a shrink wrap effect, what you actually want to modify is the "bias" value of your cloth bindings. A value less than 1 means that after initialization, the solver will think that all of the bindings should be shorter than they are, and will effectively pull them all inwards to compensate.
So if your cloth is composed of bindings that are 1.0 units in length and you set bias to 0.5, the solver will think the cloth has been stretch x2 and will shrink down. Same goes for the inverse....set bias to 2.0 and the cloth will blow up (without internal forces, just expand as it thinks it has shrunk down).
So proper bias settings are important for shrinking/expanding effects. Good for garments too, if you want to simulate tight seams.