Hem Growth

Vially

Okay, so making a shirt, and followed the tutorial on creating hems to "finish" the shirt. Great, looks good, there are issues with it, but it looks fine (Image 1 is a render of said shirt, just 'in place'.

So anyway, applied a dForce modifier, change the pose slightly on frame 15, and set it into motion.

The very firsy thing DAZ does it inflate the geometry of the hems? What the Heck?

Image 2 is a capture of frame 1 in the simulation. (hem blows all to heck and back, but that's another topic.)

Anyone know any reason why DAZ is inflating this hem geometry when doing a dForce Simulation?

BTW, it doesn't ever put it back to what it was, it inflates it, and then blows it up :)

 

Thanks,

V

JonnyRay

First glance / guess .. I assume the entire shirt is modled as a single object.

Are the hems properly welded into place with the rest of the shirt object?

If so, are the hems seperated into their own surface? If so, you might try a simulation setting on them that makes them more rigid.

Vially

Well the welding is another question I had in the Hex forum, but was properly dismissed. the hems are created using a line around, Copy, Paste, add thickness to the new line, Weld proximity. Steps are correct, but what I wind up with is a lollipop shape, with the shirt fabric ending at the center line of the hem.

Welded? Sure, except, no not really, they do explode off the shirt fabric in a few more frames.

Image attached shows what I wind up with.

They are a part of the same entity, yet seperate; they do have thier own surface, and yes, it is "supposed" to be all one piece of fabric.

JonnyRay

So that's what's happening then. DForce is treating the hems as if they are separate from the main part of the shirt. To fix that, you will have to get the two pieces to properly weld together. In my experience, this often means doing a lot of subdividing and welding vertex by vertex to make it work. There may be other tools that are faster, but that's how I would end up doing it.

Vially

Yeah sort of figured it was going to be a long and arduous fix, (are there any other kinds?)

So I actually started doing just that before the reply, and there is progress; however, with each step forward there always seems to be 2 backward.

First issue I have is that the seam itself doesn't have enough sides to it to line up properly, and I think i missed welding the correct points once or twice, which account for "Some" of the twisting that can be seen in the image, that has to be resolved, the hem should not twist at all.

Second is that it is collapsing in on itself, which you know, as a dynamic surface makes sense that a tube would try to become a plane; however, the "hem" should maintain a slightly stiffer form than the fabric, while still maintaining it's shape. I haven't done much with dForce, so not sure which parameter might give me the results I'm looking for.

Image is the hem around the neck, and it appears to have maintained it's original shape, more or less, it atleast doesn't explode. The shirt itself is another problem, since it appears to weld itself to G8F, not clear what happens there.

It DID however make it through 30 frames without exploding, I mean once I resolved her arms passing through her body when going through the 2 poses. (thus also passing through the shirt, BOOM.)

 

As for the seam along the bustline, not sure how to resolve that one inflating. I haven't done anything with it, but it's next on my fix the fix of a fix list :)