Cloth simulation collision

[KévinH]

Hi everyone I hope you are fine.

This is my first post here.

I have a big issue with cloth simulation when I simulate a cloth with a wind force and a collider on an object the cloth is going through the object I tried to put more subdivisions both on the object and the cloth but it's not working.

here's a link with a video showing the problem ( https://drive.google.com/file/d/1oEMBujg8OgkcHMFRKthdGwijUhsrvbBP/view?usp=share_link )

Thank you so much for your help

[Dr. Sassi]

Hi KévinH,

I would need the scene file reduced to the problem. Besides that, best guess, you might need to increase the step amount.

https://help.maxon.net/c4d/2024/en-us/Default.htm#html/OPBDSCENE-PBDSCENE_GROUP_XPBDPROPERTIES.html#PBDSCENE_DRAW_GROUP

The link requires access, which will not work here for others, or they have to expose their login email, etc.

All the best

[Dr. Sassi]

P.S.: Is this scene working for you? I have left the Simulation parameters at default.

.

CV4_2024_drs_23_SIcb_01.c4d

[KévinH]

Hi thank you for your reply i tried to increase the passes but it doesn't work heres my scene file.

Thank you so much for your help

https://drive.google.com/file/d/1MK_M4ru2N0iF5a7XjFojPiiCDpiRfikL/view?usp=sharing

[Dr. Sassi]

Thanks for the file, KévinH,

The core problem is that you like to have two qualities in one. Having no Stretchiness at all, and then have full.
Please have a look here:
https://stcineversityprod02.blob.core.windows.net/$web/Cineversity_Forum_Support/2023_PROJECTS_DRS/20231019_CV4_2024_drs_23_SIcl_01.c4d.zip

I introduced a lot of Stretchiness and then limited it via a Vertex Tag. This is a quick one; you might explore it more. For this, I have created a Dummy figure to keep the calculation time short. Such a dummy can be set invisible and work for the Simulation while the actual Figure is visible.

As you can see, when you come to the last frame, large stretched polygons take over the head. That could be refined in the Vertex Map, but I left it as is, as it showcases the problem. Polygons can be pulled on, but the local "resolution" lowers, and SDS or Cloth-Surface will not fully remedy this. There are limits, or you can increase the mesh to the point that it will get dense.
As so often, I would use the Simulation to get to a certain point and animate from there.

All the best