Lava cloth is another way to achieve texture. Just make sure you pre-shrink it first.
I just bought 3 sheets of it MUCH cheaper than Anywhere I could find it.
"LavaCloth Kiln Shelf Linen Lava Cloth Art Glass Fusing" for a bit over 10.00 a sheet
I did win a bid but even wholesale It was over 30.00 a sheet (for what I found)
# eBay Stores >
# WOW Surplus Store ...........................Harness Weave Pattern. 36" X 36" cut piece