I've been playing 5e for a while now, and mercifully this hasn't come up yet, but it's definitely on it's way.
When a caster casts burning hands, how is that properly mapped onto a standard 1" battle mat? The easy response is a 3x3 square, and that's the method I've told myself I'm going to use. But is there a better template?
The 3x3 grid works great if the caster casts on a corner, it matches the description of a cone perfectly (each square is 5', 10, 15' away for the purposes of grid math). However, when a caster casts the spell in a cardinal direction (N/S/W/E), that math breaks down. now a second or even third square is adjacent with a 3x3 square and the spell description has fall apart.
What are the appropriate grid shapes for a 15' cone?