One grid, one clamp, one gravity field. Change only the bending coefficient. Orbit three real Newton recordings, then take every vertex into Blender.
Paused at the largest recorded RMS difference. Press release to see how it began.
Each 0.96 × 0.64 m sheet has 117 vertices and 192 triangles. Two columns are fixed. Every free vertex has mass 0.01 kg; gravity is 9.81 m/s². All three start at rest.
No collisions, self-contact or learned policy. The dashed outline shows the initial sheet.
RMS separation compares all 117 corresponding vertices at the same sample. Free-edge drop is the mean vertical displacement of its nine vertices from their initial height.
These finite-step diagnostics describe this experiment; they are not a validation against real fabric.
The USD stores original mesh points and velocities at every sample. Set Blender to 30 fps, then import. Frame 1 is the untouched initial state. Native readback checks the deformation.