Hi;

In a vellum cloth simulation, I need to keep the original shape of my cloth object as much as possible(In image bellow I want it stays as a flat sheet). I tried to increase bend stiffness and stretch stiffness but it doesn't works. Later, I would like to paint an attribute like “stretchstiffness” on that cloth, to control areas that I want to be more stretched…

Thanks.

I checked out your scene and updated some settings. Here are a few tips. First, increase your bend stiffness a lot to prevent the cloth from bending. Next, the main problem you had with your setup is WAY too many points on your cloth grid. I reduced the number substantially, and the stiffness worked. The reason for this is that having too many points in your mesh, and therefore too many constraints in your mesh, require a lot more substeps and constraint iterations to resolve properly. As you reduce the point count, the vellum solver performs a lot more predictably. See the attached file.

Midasssilver
I checked out your scene and updated some settings. Here are a few tips. First, increase your bend stiffness a lot to prevent the cloth from bending. Next, the main problem you had with your setup is WAY too many points on your cloth grid. I reduced the number substantially, and the stiffness worked. The reason for this is that having too many points in your mesh, and therefore too many constraints in your mesh, require a lot more substeps and constraint iterations to resolve properly. As you reduce the point count, the vellum solver performs a lot more predictably. See the attached file.

Thank you.