Lightning bolt is listed as having a width of 5 feet.
When using a battlemap, can the line of the spell be directed between squares to affect creatures on both sides with full damage?
Does Lightning Bolt affect everyone in its line of effect? suggests this would be true for Pathfinder rules. Its answer suggests that even if the lightning bolt passed a tiny corner of a square – the creature would take full damage. Does this hold true in 5e?