Here's a version with a 4096 polygon blanket (64 x 64 polygons, just over four times the polygon density of the first one). The same settings and the same pose were used, with a resulting average time per frame of nearly eight seconds. This took about seven and a half minutes to proccess. Note that it has much better wrinkles, and seems to be a much lighter type of cloth. However, as I said, it took more than ten times as long to calculate in an otherwise identical setting. I should note that at an even higher resolution (128x128 polygons, or more than 16,000 polys), the actual polygon structure of the horse became visible - because the mesh of the blanket was so tight, it had several polygons for each Horse polygon, and thus clearly showed the horse's faceted nature.

Remember, kids! Napalm is Nature's Toothpaste!