Return to Answer

Edit: A more intelligent way to do it is to remove the pin group during the simulation with the Vertex Weight Mix modifier.

Don't subdivide your wallpaper mesh too much if you don't want it to look too flexible. You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

You can use the Vertex Weight Mix modifier.

Don't subdivide your wallpaper mesh too much if you don't want it to look too flexible. You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

Edit: A more intelligent way to do it is to remove the pin group during the simulation with the Vertex Weight Mix modifier.

Don't subdivide your wallpaper mesh too much if you don't want it to look too flexible. You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

Previous answer:

Maybe create a first simulation for the 2 corners (just pin the rest of the plane) and apply the simulation as shapekeys, keyframe the shapekeys:

Then create a second simulation and in the Cache make it start when it is supposed to:

Edit: A more intelligent way to do it is to remove the pin group during the simulation with the Vertex Weight Mix modifier.

Don't subdivide your wallpaper mesh too much if you don't want it to look too flexible. You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

Edit: A more intelligent way to do it is to remove the pin group during the simulation with the Vertex Weight Mix modifier.

You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

Previous answer:

Maybe create a first simulation for the 2 corners (just pin the rest of the plane) and apply the simulation as shapekeys, keyframe the shapekeys:

Then create a second simulation and in the Cache make it start when it is supposed to:

Edit: A more intelligent way to do it is to remove the pin group during the simulation with the Vertex Weight Mix modifier.

Don't subdivide your wallpaper mesh too much if you don't want it to look too flexible. You can create 2 groups: The Pin group (the whole paper except the 2 top corners) and a group with no vertex that you'll call NoPin. Give your paper a Vertex Weight Mix modifier, then Cloth, then Subidivision Surface. In the Physics panel > Cloth > Shape choose the pin group. In the Vertex Weight Mix modifier, select Vertex Group A (Pin) and B (NoPin). Choose Vertex Set > VGroup A or B, Mix Mode > Replace. Keyframe the Global Influence value the way you want in order to mix from A to B:

Previous answer:

Maybe create a first simulation for the 2 corners (just pin the rest of the plane) and apply the simulation as shapekeys, keyframe the shapekeys:

Then create a second simulation and in the Cache make it start when it is supposed to: