Poison Gas

Poison gas being spewed by some Gas Pillars

Poison Gas is a dangerous, green gas created by Spore Flowers, Gas Pillars, and Elite Gas Stingers, that deals 10 damage per second to the pioneer and some other creatures. The Gas Mask with Filters can be equipped to temporarily prevent taking damage from it. Spore Flowers and Gas Pillars, when destroyed by the explosion from a Nobelisk or Explosive Rebar, will stop producing poison gas.

Some areas of the map are filled with poison gas without there being Spore Flowers, Gas Pillars, or any other source for it.

The screen becomes tinted red and have effects of chromatic aberration while in poison gas, even with the Gas Mask equipped.

Bugs

Some areas with poison gas do not have the green visual but still do damage.
Some areas with a destroyed source of gas, such as Gas Pillars and Spore Flowers, retain the green visual but no longer do damage. Caution should still be taken due to reduced visibility of other threats.

If the pioneer only stays in the poison gas for less than 1 second, then no damage will be taken.^{[citation needed]}
If the pioneer is within the radius of multiple sources of poison gas, they will take more damage than if stood within the radius of only one source.^[1]
Poison gas also deal damage to Hogs, Spitters and Space-Giraffes, which can be observed around Crash Sites where creatures within the gas die quickly.
The time it takes to kill a Pioneer at full health from gas is longer then the time it takes to pickup a Power Slug or an Artifact. Thus making it possible at the cost of significant HP loss to obtain these resources early without a Gas Mask.

Patch 1.0:
- Increased damage from 5 to 10.
- No longer deals damage when in vehicles.