Landslides

[AlexDC 8]

Maybe visual clues. Drips of water falling. Different tones of colour of the grass. Slightly different particles when starting to dig the block.

Anyway, you are right; it's a little overcomplicated, both for player and for the computer. Basically we would add extra data to every block in existence, and that may be a little too much. But it would be so close to reality... And once you know how much humidity is on an area, the dinamic creation of streams and rivers becomes a posibility, even with finite water.

Perhaps the biome could have an effect as the biomes are already distinctive enough for players to recognise or additional the idea of seasons has been kicked around quite a bit which I think would have more effect on the possibility of landslides in reality. Seasons could be determined by a sundial type device that shows the approximate month or perhaps a slight tint could be added to the sky when the sun is setting. eg keep red for summer, greenish for spring, blue for winter, brown for autumn.

[Cuelio7 0]

Instead of land slide there could be avalanches maybe? In snow biomes?

[Gelondil 0]

I agree that the idea of dirt (and cobblestone) shifting and settling in the rain is a good one - and something like that mod would work perfect. As you said, Alex, dirt (and cobblestone) could use the same physics but perhaps with a little more forgiveness than the mod does for sand and gravel.

To those who complain about the risk of rockslides impacting your forge production, or from preventing you from building your sky house, that's silly. When you build your skyforge, you should shore up your foundations with support beams or stone blocks or anything, instead of cobblestone and dirt. Besides if you have even a generic wooden floor and one solid wall, you'll be safe due to minecraft physics.