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Fission Extinction Event
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84.631 MB
19 Apr @ 11:03pm
20 Apr @ 5:38pm
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Kraft
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Fission Extinction Event

Description
The state of this world is the result of a bug preventing viable cell mutation, thereby facilitating extreme overpopulation by two highly aggressive species.
After resolving the issue, one of these species developed a mutation that allowed each cell to execute the fission operation numerous times within a single lifespan. The population count grew exponentially and eradicated all other life in the simulation.

This save captures the very beginning of the extinction event.
7 Comments
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sityak  [developer] 21 Apr @ 1:51am 
I will create an update where the game will check if the upload folder contains savefiles, and will notify you!
Kraft  [author] 20 Apr @ 5:39pm 
Oops! Should be fixed now.
sityak  [developer] 20 Apr @ 2:41pm 
It seems like you forgot to put the savefile to the content folder, there are only 2 screenshots, no saved file
Kraft  [author] 20 Apr @ 9:22am 
Can't thank you enough for working to make these big worlds serviceable!

RE: the mutation bug - it seemed as though cells would only ever attempt a single shared mutation across the entire species and the sim was failing to validate this against the editable conditions to determine viability. They each began to produce the same doomed mutation and the lineage would completely stagnate. Absolutely had me banging my head against the wall.
I hadn't actually made any initial changes to the default constants. Thankfully, the issue only occurs in the Vulkan runtime and so I saw immediate progress when switching to OpenGL, minus a few frames.
Eva 20 Apr @ 5:31am 
What was the bug preventing mutations? I know of some ways for that to occur, but curious what happened in your sim. (One way for this to occur is to set energy required after division to 3000 out of 5000, or to set required HP to 6 out of 10. Neither is achievable before mutations and so nothing can ever successfully divide and get established.)
Eva 20 Apr @ 5:25am 
I also up the minimum HP and Energy that must be left after a division event. That would also help prevent this.
sityak  [developer] 20 Apr @ 5:06am 
Nice! This is the main reason I pushed hard for optimizing code to allow bigger worlds, with bigger worlds there are always some "normal" cells left in crevices that can repopulate after an extinction event. I also added cell max age so this population boom, which is more like to a cancerous growth than anything else, is contained by something.