"Got a problem? Why not solve it by dissolving it?"
All the particles in this picture are custom. All made by me.
If you recognize this weapon, you are (probably) damn right!
It's Svdl's "The Corp Killer". It can be found here. tf2mods.net/mod.php?id=552
So... Much... NEED IT!
And having a friendly teatime with barrels, containing corrosive and radioactive material, with hats.
Very well detailed. The only small thing I would change is having the Pyro a bit more to the left, aka rule of thirds I´ve talked with you about.
Besides that, this is a flawless poster.