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Hi @harsha99ar,
Isaac Sim ships two ready-to-run thin-shell demos that cover this case — you can open both from the menu without writing any code:
Window → Demo Scenes → Deformables → Surface Deformable (recommended)
This is the modern FEM thin-shell deformable. It’s the right starting point for paper bag / foil-style materials in Isaac Sim 5.x and 6.0 going forward. Click “Add to stage”, hit play, and you’ll see a sheet drop and drape. From there you have access to the surface-deformable parameters (Young’s modulus, Poisson’s ratio, dynamic friction, density, and the plasticity attributes on PhysxDeformableBodyAPI if you want creases that stay — paper bag and crushed-foil behavior). The demo source is at <isaac-sim>/extscache/omni.physx.demos-*/omni/physxdemos/scenes/SurfaceDeformableDemo.py if you want to copy the setup verbatim.
Window → Demo Scenes → Particles → Particle Cloth (legacy)
PBD particle cloth — fast and stable, but elastic (the sheet springs back once contact lifts, so no permanent dents) and the API is officially deprecated in 6.0 (Please note that support for particle cloth and related APIs is now deprecated. These features will be removed in future releases.). Use only if you specifically need PBD behavior and are on 5.x. Note: to see this demo entry in the menu, the deprecated-API toggle needs to be on (carb setting physics:enableDeformableDeprecated); the modern Surface Deformable demo replaces it.
Hope these are good starting points.
Hello!
We noticed that this topic hasn’t received any recent updates from anyone reporting this issue, so we are closing it for now to help keep the forum organized.
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