Pollution stimulus

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Pollution stimulus is a beneficial hediff that is granted to insectoids and pawns with the Pollution stimulus gene when on polluted terrain.

Stages

Stage Begins at Symptoms
Pollution stimulus (minor) ≥0%
Pollution stimulus (moderate) ≥20%
Pollution stimulus (maximum) ≥50%

Progression

Every 60 ticks (1 sec), an insectoid or pawn with the gene will increase in stimulus severity by +3.33% if on polluted terrain, or −0.03% if on unpolluted terrain.

Threshold range Real time since 0% severity[1] Game time since 0% severity[2] Real time in state[3] Game time in state[4] Real time since 100% severity[5] Game time since 100% severity[6]
None 0% - - - - 200,000 ticks (55.56 mins) 3.33 in-game days
Pollution stimulus (minor) 1% - 19% 18.02 ticks (0.3 secs) 0.01 in-game hours 36,000 ticks (10 mins) 0.6 in-game days 162,000 ticks (45 mins) 2.7 in-game days
Pollution stimulus (moderate) 20% - 49% 360.36 ticks (6.01 secs) 0.14 in-game hours 58,000 ticks (16.11 mins) 0.97 in-game days 102,000 ticks (28.33 mins) 1.7 in-game days
Pollution stimulus (maximum) 50% - 100% 900.9 ticks (15.02 secs) 0.36 in-game hours 100,000 ticks (27.78 mins) 1.67 in-game days - -
Pollution stimulus (maximum) 100% 1,801.8 ticks (30.03 secs) 0.72 in-game hours - - - -
  1. Real time spent before entering the state, assuming severity is increasing and the starting severity is 0%
  2. Game time spent before entering the state, assuming severity is increasing and the starting severity is 0%
  3. Real time spent in the state before crossing the lower threshold, assuming severity is decreasing from higher threshold
  4. Game time spent in the state before crossing the lower threshold, assuming severity is decreasing from higher threshold
  5. Real time spent before entering the state, assuming severity is decreasing and the starting severity is 100%
  6. Game time spent before entering the state, assuming severity is decreasing and the starting severity is 100%

Analysis

Severity increase is very rapid compared to its depletion. A single hour spent in polluted terrain will keep a pawn in the maximum tier for 40 hours. This means that relatively little polluted terrain is needed to maintain the bonuses. Place some under where a pawn will commonly spend a few hours a day. Bedrooms and meditation spots are good if not every colonist has the gene.