Animation of material looks bad

Hi, I am currently learning Unity and is following a tutorial from the book "Unity Game Development Essentials", where i am creating a campfire with fire and smoke.

When i playing the game the animation is looking weird as both the fire and the smoke animation is surrounded by a square.

As i am following the book i have redone this but it still looks bad.

Anyone that could give me a hint?

Cheers

Problem solved.

I drop the material and not the smoke shader, which the material is part of.