Why does a plane like in this video does work with soft cloth and not a flattened box or a simple plane from Iclone . “Plane_Retangle.iprop” does NOT work while “Plane_001.iprop” DOES Work ?
For cloth deformation surface needs to have a geometry - enough polygons to bend along edges. Mentioned props do not practically have it. Plane_Retangle.iprop only has one face and box one face on each side. Enable Wireframe view to verify geometry before enabling Soft Cloth physics.
Now i have another little problem, i wanted to cover a nude person with a sheet, but it seems Cc3+ chars cant be used for rigid body, would i need to convert it into a prop ?
Same as with dresses and coats, you have to enable and position Collision Shapes on a character.
But if you want controlled and quality sheet animations, Blender is a way to go. Blender sims can be imported into iClone as Alembic. A steep learning curve would be involved to master it though. Here is a basic guide to start in Blender.