cloth animation not working after adding loop cuts on the edges so, I am making a scene, where I have a piece of paper, with a cloth animation on it.  (see image below)

I have a subdivision surface on the paper, but I want to have sharp corners.  My problem is, is that every time I add a loop cut to the mesh to get rid of the sharp corners, the cloth animation suddenly stops working.

working.  Does anyone know why this is happening.  And better yet, how to fix it?  thanks :)
Another way to sharpen edges would be the &quot;mean bevel crease&quot;. maybe try this.

btw: I added a file to the question you commented on. Not sure, whether you'd get notified of that. :)
Cloth is colliding with some objects but not all