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Slow Dforce simulation

kalina.pepa_29135cfc8ekalina.pepa_29135cfc8e Posts: 49
in Daz Studio Discussion

Hi, i want to ask, if anyone knows, what could cause Dforce simulation, running like 3 times slower, compared to simulating day before.... same settings, scene, and clothes, but simply, now simulating one shirt and skirt on character ,takes ~8 minutes, instead of around 3 minutes ,also somehow, DAZ stops responding in between the simulating progress....... no matter what setting i changed, even the static simulation takes way longer.. im using RTX3070, and never had such issue with slow simulation. thanks for any tips

Comments

  • felisfelis Posts: 4,311

    Is it the same shirt and skirt?

    Have you changed any simulation settings?

    Are there more objects in the scene that needs to be processed, like adding hair?

    DForce become slow, the more edge lengthes that are violating collision distance, so a very dense mesh will simulate way slower than else.

    Also changes to simulation settings, such as substeps will affect simulation time.

  • kalina.pepa_29135cfc8ekalina.pepa_29135cfc8e Posts: 49
    edited January 2023
    as i mentioned, no changes were made to the simulation, the same clothes....

     no hair added, the rest is made invisible in simulation.. i only closed DAZ day before, and re-opened today

    Post edited by kalina.pepa_29135cfc8e on
  • felisfelis Posts: 4,311

    Then I can't imagine why the simulation is slower.

  • kalina.pepa_29135cfc8ekalina.pepa_29135cfc8e Posts: 49
    edited January 2023

    me neither, thats why i wonder, and even tried empty scene,  other clothes in simulation, with  the same results..i even updated my GPU drivers, no change

    Post edited by Richard Haseltine on
  • docbotherdocbother Posts: 107

    Not sure how you would check this; Could it be using cpu-only now vs before? Just and idea - I don't even know if you can get studio to use cuda for simulation..

  • crosswindcrosswind Posts: 6,926

    Nothing was changed but just close and open Daz then it's getting slower...it's a bit strange indeed ~ Suggest you install a beta verison of Daz to run this simulation to see if there's any difference~

  • DartanbeckDartanbeck Posts: 21,551

    Maybe check the Simulation setting in the Surfaces tab - namely Velocity Damping and the Interations for it. kinda peek around an any non-default numbers that may cause a lag.

    In the Simulation tab, one might also check for non-default settings in there too.

     

    Now, I'm not saying that non-default settings are bad. I use them all the time - always. But it's the first thing I check if something doesn't seem right. 

    Another thing that can just bog down an otherwise fluid experience would be having something else in the scene - even if it never collides with the simulating object, which is Visible in Simulation in the Display section of the object's properties tab. Setting everything that doesn't need to collide to invisible during the simulation will fix that. Sorry, just mentioning things that come to mind.

     

    I use Linday's Classic Long Curly Hair with dForce, so I'm accustomed to lengthy sim times. Yet I can also tell if it's going a bit slower than normal. Almost every time it seems to be slow is when I've added something to the scene and forgot to turn off Visible in Simulations. Other times it's when I'm trying a trick I learned from Linday's products: Turning on Velocity Damping with 1 or 2 iterations. But when that's the case, I lalmost always go back and let the sim run slowly with those settings turned back on - as it can help remove those flutters when the cloth is beating against a mesh.

    Hope some of this helps. dForce is awesome to me - and I want it to be awesome for everyone else too!

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