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[Dunamisdeos]

I have a 12z tall fall trap with lead at the bottom.

However, I have also filled it with 110 iron spears.

Will the spears prevent the elves from taking the fall damage from landing on lead?

[Henry47]

Does it matter, they should die either way.

[PatrikLundell]

My understanding is that the floor hardness adds to the damage. However, a 12 Z level fall is unlikely to kill (I tried 20 onto lead and my test undead (goblin or somesuch, not a head/hair/etc) only got bruises (so spikes, though. I was trying to make a splatterer).
Thus, lead would probably not make much of a different compared to regular stone.

[Lozzymandias]

Making long drop traps is a real bastard, I had a 20z drop onto platinum floor and it barely reliably killed the bastards, let alone splatter them. I have heard tale in previous versions that captured goblins that dodged the spear they were thrown into managed to survive much taller drops. I don't if this remains true but I wouldn't bet the farm on it.
I'm not entirely convinced a denser floor does more damage. I tried to do some !!SCIENCE!! in the arena but it only goes 10 ź levels up.

[Skorpion]

My understanding is that the floor hardness adds to the damage. However, a 12 Z level fall is unlikely to kill (I tried 20 onto lead and my test undead (goblin or somesuch, not a head/hair/etc) only got bruises (so spikes, though. I was trying to make a splatterer).
Thus, lead would probably not make much of a different compared to regular stone.

We should test lead floors versus steel floors.

[King Kitteh]

Are boulders of ore as heavy as their metal, but still hard? Perhaps you could pave the floor with that.

[Fleeting Frames]

Since falling onto the floor is modeled as cube with density hitting, the volume of boulder vs block shouldn't matter.

@Skorpion: Be my guest, though I expect the difference would be slight, given differences between steel and silver for blunt weapons. For maximum damage, I'd pick platinum, due platnium warhammers performing better.

For minimum damage and most stark test results, should pick featherwood of course.

[Pirate Santa]

Ninja'd! But yes fall damage is modelled as being hit with a block of the material, so warhammer rules apply. Denser is better.
From wiki:
The density of the material in the landing zone can have a significant effect on the outcome of a fall. Light materials like featherwood reduce the risk of serious injury, while dense materials like platinum increase it.

In general, falls of 1-2 z-levels are unlikely to cause significant damage to your dwarves, and goblins have been seen to fall more than four with only light bruising and stunning. Large falls (30+ z-levels) will tend to cause the hapless victim to explode upon impact. The minimum drop with 100% mortality appears to be around 25 z-levels.

[Iamblichos]

This discussion is the essence of DF.  Well done, all.

[GhostDwemer]

Is the spike dodging bug still around? In .34 at least, dodging the spike would instantly give legendary dodging ability.

[Evans]

I can attest that pit traps that rely on fall damage are obsolete.
21 lvl drop onto lead floor is likely to break all the bones in arms and legs, but if it won't jam them it won't kill the creature.
What is worse any creature falling onto the one already on the floor will ignore floor density completely due to cushioning effect.

Setting upright spear/spike is the only way to make use of pit trap these days.

Also:

Is the spike dodging bug still around? In .34 at least, dodging the spike would instantly give legendary dodging ability.

It didn't worked like this. From what I have personally witnessed, an enemy had to dodge all 10 weapon in the trap onto another square where he dodged another full weapon trap.
This somehow multiplied the experience right into legendary dodging.

[muldrake]

In general, falls of 1-2 z-levels are unlikely to cause significant damage to your dwarves, and goblins have been seen to fall more than four with only light bruising and stunning. Large falls (30+ z-levels) will tend to cause the hapless victim to explode upon impact. The minimum drop with 100% mortality appears to be around 25 z-levels.[/i]

I've done 30.  The descriptive text is really satisfying and the victims were really, really dead.

[Fleeting Frames]

Is the spike dodging bug still around? In .34 at least, dodging the spike would instantly give legendary dodging ability.

If you meant falling 2, 3, 5, or 9 z-levels onto spikes giving super skills, that was fixed.

[kingsableye]

I remember Human prisoners would throw the demon lord of a Goblin civ and that caused it to die due to impact with a slade wall. But digging 100+ z-level pit to slade would be pointless given the depth you've already dug.

[wierd]

Did they ever fix the "shaft of enlightenment" bug, where a fall onto a spike trap would result in massive dodger skill increase?

Also, falling science was conducted extensively in the past.  The thread was dwarfy as hell. Worth the read.

http://www.bay12forums.com/smf/index.php?topic=93256.0

details quite well how deadly falls from each zlevel are.