sbstrd aka the bandcamp bandit~
Cobwebs are a placeable item that was added in Beta 1.5. They only appear naturally in abandoned mineshafts or stronghold libraries. Cobwebs were previously found in the terrain.png file but had no block ID assigned to it. They were officially added in Beta 1.8 and generated in abandoned mineshafts. Cobwebs are also flammable, but they can't be ignited by burning blocks nearby.