THRESHOLD: All Air Canister Locations (Where to Find Them)

The first stray air can is right off of the beginning wooden path by the outhouse. It’s behind some small crates.

The second stray air can is further into the story, when you use your spare wood planks to make the platform to the observatory room. Inside of the room there’s an air can on the ground
[NO SCREENSHOT AVAILABLE]

The first air can is located near the left of the entrance to the small tunnel. It’s in the water and is a little difficult to see.

The second air can is further down the river on the left side of the riverbank. It’s underneath the wooden pathway behind a small wooden pillar.

The third air can can’t be collected right away. You must wait for the event where the train completely stops and the river dries up. Then go down the river and it should be somewhere in the middle.

The first air can is on the top of the outhouse. Hop on the fence/rock next to the outhouse first, then you can jump onto the roof where you’ll find the air can as well as another message from Ni.

The second air can requires the red key. In order to get the key you need to go to Ni’s grave with the bucket and dig it up. This will reveal Ni’s hand, which will be holding the key.

Once you have the key, go back to the outhouse and unlock the seat. Lift it up, use your bucket to remove some of the waste, and you’ll find the air can.

Both of the air cans are in the same area. There’s a collection of big crates in the corner.

The first air can is on the other side of the crates. Simply jump on top of the left-most crate and over it you’ll find the air can as well as a message from Ni.

The second air can is on top of the crates. Jump back on to left-most crate and you should be able to walk up onto the next crate, looking on top of the highest crate is where you’ll find the air can.

These air cans are only available during the THRESHOLD. They’re on top of the building, the only way to get up there is to have the corpses/animal carcasses stack up and knock over one the pine trees, which will lean up against the building. Once the bodies are high enough and the tree is over, you should be able to scale the tree and get onto the roof. This is where the final two air cans are.
[NO SCREENSHOT AVAILABLE]
You can either blow the black whistle a couple times until the recycling plant explodes to speed up the process, or you can wait an extremely long time.