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Idea Scribles:

Adding a water drain feature in the vent so it would seem a little more realistic because of the water vapor from the geothermal vent, irrigation boost for a small amount of time 2 hours, if it becomes too full of water vapor then over 2 hours it's going to slowly drain crops durability, because of water saturated mud. Mod options to be able to turn it off and on.

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Detailed Idea:

2 Hours till full capacity of the "water vapor" (Condensed Water) the filter in the vent in those 2 hours will give a fertility boost after 2 Hours more it's going to slowly detoriate the durability of the crops...
a water drainer can empty the filter specified citizen job, the emptied filter could give a random stone chunk because of the dirt in the filter or give nothing depending on chance... (To eliminate build up of Chunks)

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Finalized Idea:

Full water capacity: 2 Hours.
Fertility boost after full water capacity: 2 Hours.
Fertility boost slowly detoriating Till it becomes a detoriater of durability to crops: 2 Hours.
Detoriater of durability of crops: Till the water capacity is drained.
25%: Chance to generate a random stone chunk.
Citizen interaction: Drain water and stone chunk removal if any.

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Mod option:

To be able to turn the realistic feature on and off
when in the main menu of the mod option.

an "over-wall auto vent" if "replace stuff" mod is present (settings for over-wall auto vent, to be turned off or on and for non-overwall).

anyway thank you very much for this great mod.