Knightfall
World of Kulan DM
And this old thread here on EN World...
www.enworld.org

Does the Fireball spell expand in a narrow corridor?
Anyone know the d20 ruling on this? I recall in 1st and 2nd edition it filled 33 10x10 cubes. Now I am not certain if it has the same properties as Lightning Bolt ie blocked by obstacles. The PHB mentions nothing under the Fireball spell. If someone can find an official ruling citied...
