Problems with the FEM_GPU SImulation Method

Follow

rafaelcoppola

• January 16, 2019 04:49

Hey guys, i have 1080TI graphic card and the last version of GeForce drive.
Iam originaly from Marvelous and iam really excited when i read that CLO is now with GPU simulation, thats defenetly ia a game changer!
I noticed some problems, but I would like to know if it is a known problem that is already being solved or if it is something I am doing wrong.

1- The first is that I noticed that the simulation is different when we are in GPU mode. In addition to being faster the simulation, it seems to present some problems where the mesh crosses the mesh itself. Look at those images

2- When I put in GPU method for the first time, my CPU keeps running at 100% and my GPU reaches max 50%. If I change the method to CPU and then after, try to go back to the GPU method, it does not seem to work qith GPU anymore, the simulation still being processed only by the CPU and does not use anything from the GPU anymore.

0

• rafaelcoppola

  • January 24, 2019 04:33

  i make a video to show the problem in a best way...look (put in full screen to saw what i wrote), please
  https://vimeo.com/313096901 

  0
• pabloquintana

  • January 29, 2019 05:54

  Hey there Rafael. Did you get an answer about this? I have the same issue where the FEM_GPU allows materials to poke through much easier than FEM_GPU even with the same collision settings.

   

  Any comments Erica?

   

  P

  0
• Lea

  • January 29, 2019 06:23
  • Edited

  Hi guys,

  I am checking the issue with our developer so will get back to you soon.

  Best, Lea.

  0
• Lea

  • January 30, 2019 07:58

  Hi rafaelcoppola  and Pablo Quintana ,

  
  I am deeply sorry for my super belated reply. It took a while to check the exact issues of GPU simulation with our developer.
  
  To explain in detail, in order to speed up the simulation, GPU simulation has been coded to detect relatively few elements than CPU simulation does for detecting a collision.
  Thus, collision handling is unstable compared with CPU simulation which sometimes causes penetration & intersection problems.
  In addition, since the thickness of garments is fixed in proportion to the particle distance, GPU simulation widens a gap between layers and alleviates Penetration & Intersection problems.
  
  Currently, the developer in charge is trying to improve the collision handling of GPU simulation so that it would get more stable in a future CLO version.
  
  Furthermore, let me share the recommended use case of GPU simulation below.

  • To coordinate multiple garments
  • To modify the garment after draping stage
  • When the collision handling is unstable with CPU simulation. Sometimes GPU simulation can help to resolve the unstable collision problems.

  
  Let me know if there are any other questions about it :)
  
  
  Best,
  Lea.

  0
• pabloquintana

  • January 30, 2019 13:35

  Thanks @lea.

  It sounds like FEM_GPU simulation is not robust enough for production yet.

  I hope is fixed soon enough.

  P

  0
• rafaelcoppola

  • February 13, 2019 21:32

  thanks @Lea....
  i hope the FEM_GPU can be improved in the near future! =D

  0
• Lea

  • February 14, 2019 02:25

  Hi Pablo Quintana  and rafaelcoppola 

  We are also aware of that GPU simulation is not perfect yet. It is still on a development :)

  The roadmap of GPU simulation eventually aims to achieve the same result as CPU simulation at much faster speeds.

  Please hang tight for an improved GPU simulation and your feedbacks are always welcome!!

  Best,

  Lea.

  0

Please sign in to leave a comment.