ndorigatt, congratulations on your first cloth simulation. Not bad for the first attempt.
Blender has a steep learning curve. One has to invest lots of time to learn it. We can sit all day in front of a computer just to experiment with cloth simulation alone, but since it is free, I can't complain about it.
In Blender, you can use cubes, cones, cylinders, etc, or combination of all, to drop the cloth on. To simulate the edge of a bath tub, for example, I used a cube and resized it to about the same height and thickness as the side of a bathtub.
The angle and height where the cloth start to drop, as well as its size, material, etc, play important parts in getting the right result you want.
Of course, before exporting to obj, you have to delete all other stuffs, leaving only the cloth.
Anyway, since this thread is about glass block, maybe we should start a new thread about creating cloth instead.
