Dust 2 one way smokes were a big part of CS:GO. Defenders smoked a corner and watched feet through the gap while the attacker saw nothing. In CS2, most of those tricks stopped working. This guide explains why, what kind of one-way can still work, and how to test one yourself. It does not list specific current one-ways, because we could not verify any.
What made the old one-ways work?
In CS:GO, a smoke was a round cloud with a fairly clear edge. If you threw it against a door frame or box, the edge left a thin gap on one side. The player on the near side could see through that gap. The player on the far side could not.
Dust 2 had famous examples. One of the best known was a smoke thrown from the A bomb plant toward Long. CTs on the site could see Ts walking up Long, but the Ts could not see back.
Why did dust 2 one way smokes break in CS2?
CS2 smokes are volumetric. They flow outward and fill the space around them, including corners and doorways. Reports from launch said that corner one-ways like the A plant smoke toward Long no longer work. The smoke now fills the gap they needed.
Other changes matter too. Every player sees the same smoke. Bullets carve short holes through it, and an HE can push it away for a moment. Shooting through smoke also shows where you are. That makes the old one-way spray much less safe. Our volumetric smoke guide goes deeper on these mechanics.
What kind of one-way still works?
Height-based one-ways can still work. CS2 smokes have a minimum height. If a smoke settles on top of a box or ledge, a player at a lower angle may see past it while staying hidden. This kind of one-way was reported to work much as it did before.
A second kind is temporary. You can shoot a hole or use an HE to see through a smoke. It closes quickly, and it reveals your position. That is a short look, not a real one-way.
Has Dust 2 changed in CS2?
Yes, in small ways. In 2024, Valve changed a crate stack outside CT spawn toward A, opening a new route to Catwalk. In March 2026, it changed the Xbox model so players could hide fully behind it, then reverted that within hours. Any object change can affect how a smoke settles. Check recent patch notes before trusting an older clip.
How to test a one-way yourself
Use a private server with a friend.
- Throw the smoke and wait for it to settle fully.
- Stand where you would hold. Note what you can see.
- Ask your friend to walk the enemy's route. Have them call out the moment they see you.
- Test crouching and standing on both sides.
- Shoot through once and see how long the hole lasts.
If your friend sees you as soon as you see them, it is not a one-way. A practice config makes this faster. See our practice config guide.
Where on Dust 2 is it worth testing?
Height-based one-ways need a smoke resting on an object near a choke. Dust 2 chokes such as Long Doors, Mid Doors and the Upper Tunnels exit are natural places to experiment. Treat that as a place to start testing, not a promise that a working one-way exists there. For standard smokes, see our Dust 2 smokes guide.
Should you build your game around one-ways?
No. A one-way that works will soon be known. Opponents will flash over it, shoot through it or avoid it. Standard smokes, good crosshair placement and trades are more reliable. Use a tested one-way now and then as a surprise. Learn the map names in our Dust 2 callouts guide first.
Sources and checks
Smoke mechanics and map changes were checked on 1 November 2026 against WIN.gg on CS2 one-ways, PC Gamer on the 2024 crate change and Hawk Live on the Xbox change.
Frequently asked questions
Does the old Dust 2 A plant one-way to Long still work?
No. CS2 smokes fill the corners that one-way used, so it stopped working when CS2 launched.
Are there any one-ways left on Dust 2?
Height-based one-ways may still work where a smoke rests on an object. We could not verify a specific one, so test it yourself.
Why is shooting from a one-way riskier in CS2?
Shooting through smoke in CS2 reveals your position and opens a short hole. The enemy can see you and shoot back.
