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[SolarShado]

So I genned a quick throw-away world for a 2x2 fort and a magma-related test. As it happened, I stumbled across a nice site (magma, iron, flux, plenty of trees). So after i finished the test, i re-gened the world, and embarked in the same area with a slightly larger embark square. To my suprise, I found that the ores were all different, there was still magma, still a chalk layer, but no hematite or trees.

So i re-gened again, copied the region folder several times and visited the area in adv. mode. What did I find? Yet another configuration of ore, surface layers, and many more gems. So, i embarked in the same area (in the copied regions) several times with slight changes in size and biome displayed at embark (F1/F2/etc.). Each time i changed any parameter, i had a different set of ore/trees/etc. available. When all parameters match, of course, the site and resources match.

So, apparently, the exact conditions aren't created until embark? Is this a known feature/bug? Is it a feature or a bug?

SolarShado cancels browse forum: confused

[LegoLord]

I believe that a slight change in the parameters will change the layout of materials and stuff.  It's the same deal as modding the raws (I think); one little difference changes everything.

[sneakey pete]

Yeah. i've re genned worlds exactly before, and have had ores in the exact same space, down to the tile.

[Doppel]

I have had this with regular stone also, one time gabbro, after embarking on the exact same map it had changed into another stone (i believe it was granite, but i'm not sure).

[SolarShado]

What surprised me most was that it wasn't already determined at world-gen-time. I've seen and even used posted saves/sites, but didn't realize that the details were determined upon embark.

Hmm, here's a thought: if i visit an area with an adventurer, leave and come back, is everything the same, or wil it be different? Should probably test with the same adventurer and a different one.

[Magua]

I would wager that world gen generates basic information about the area -- does it have magma, what types of rocks, etc -- but does not actually generate the specifics (ores, type of HFS, chasm creatures, etc) until you embark there.  Since that heavily uses the RNG, even changes like the order in which stuff is generated could throw it off by a wild amount.

I would further imagine that once the area is embarked to, that information is kept for next time (which is why when you reclaim a fort everything stays built).

[SolarShado]

Good point Magua. I suppose it realy shouldn't be surprising. After all, storing all the details about every square to a depth of 15+ would consume an absurd amount of disk space, especially for larger worlds.

It may be interesting to mess with and try to figure out more about how it works. I think i'll do more tests at some point.