This is just a tip for creating cloth, rugs and objects like this.
In this post https://render.otoy.com/forum/viewtopic.php?f=23&t=60736&p=332810#p332810 i wondered how to create a cloth.
Now there is a new standalone plugin for sketchup that does exactly that
Seach for the plugin ClothWorks via the sketchucation toolbar.
ps. i have nothing to do with the development nor do i earn money it - just looking forward to see what people can create.
pps. it's not free, and it's not cheap nor that expensive.