In previous Minecraft versions, the fire model/shape used to have a slight angle so it pointed towards the middle. However now the fire is pure cube shaped. To replicate just use flint and steel to make a fire.
MC-62237
Fire is cube shaped
Resolved
Works As Intended
0
First picture: 1.7.5
Second picture: 14w29b
I think you're right, but I'm not sure myself.