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Struggling with dforce collision

panopticonseyepanopticonseye Posts: 0
in Daz Studio Discussion

Hello all! I'm very new to DAZ, and I'm using it to create realistic(-ish) reference images for my art pieces. I'm currently trying to simulate some draping fabric on a figure that's sitting/leaning on a rock, and every time I try to simulate it, it explodes about halfway through. I know it's a collision issue, but none of the troubleshooting I've tried has fixed the issue. The typical solutions I've seen seem to involve hiding elements, but I need the fabric to drape across both the figure and the rock she's sitting on at the same time, so I'm not sure if I can do that.

Here it is before simulation, and what typically happens.

Comments

  • Richard HaseltineRichard Haseltine Posts: 109,329

    How are you simulating? If you are starting from that pose with the rock inplace them it is not surprising that it is exploding, if you are animating or using a different starting pose then one thing to check is that the separattion between figure and rock is at least twce the Dynamic Offset for the cloth (in the Surfaces pane, if there is less than that differnce then the simulation will try increasing it - but that wil usually add energy, and if it is then too close to the other surface the next step will be to move it the other way; as more and more energy is added to the sim it will eventually cause an explosion.)

  • panopticonseyepanopticonseye Posts: 0

    I'm sort of starting from that pose; it starts from a T-pose and transitions to the end pose. I'm unfamiliar with the animation tools, so I haven't tried that yet.

  • Richard HaseltineRichard Haseltine Posts: 109,329

    What about the rock? What happens to the legs - if you start in a T then I would suspect there is a fair chnace they cross through each other, which could trap part of the outfit and cause an explosiion much the same way as in my previous post. Using the Timeline, with the rock slidiing in from behind and with an intermediary pose to stop the elgs intersecting, would probably be the best approach here.

  • panopticonseyepanopticonseye Posts: 0

    The legs don't actually cross; here they are from the front without the fabric. I just tried the timeline method, but an explosion occurred as soon as the rock slid in. Could I be missing some kind of setting?

    Screenshot 2026-03-20 at 23.16.04.png
    790 x 700 - 504K
  • felisfelis Posts: 6,112
    edited March 21

    It looks to me as the character is clipping with the rock, and that will cause an explossion.

    Have you checked that there is a gap between the character and the rock? It should default be at least 4 mm.

    Post edited by felis on
  • panopticonseyepanopticonseye Posts: 0

    Moving the character away from the rock helped, but an explosion still occurs at about 84% simulation completion. I can't seem to find any other possible collisions, so now I'm just confused!

  • Richard HaseltineRichard Haseltine Posts: 109,329

    SDometimes a rapid movement can be the issue, the simulation just can't keep up with the rate at which momentum/energy is being added. You might try upping the Subframes and/ot Iteration per Subframe values in Simulation Settings.

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