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Originally Posted by Mutant Sheep
Why do you give us these ideas when we know they will never happen. 
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I was kinda hoping that it was a little early to rule it out.
Quote:
Originally Posted by CrimsonAngel
How does that work? If something is running along the floor, does it disappear when the floor starts to slope up?
Here is a picture.

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No, but coloration is generally due to standing water and sediments settling, which flatten out with gravity. Running water generally doesn’t leave a stain on stone.