On Thu, Oct 14, 2010 at 4:10 AM, Adam Borowski <kilob...@angband.pl>
wrote:
> Insects do have trachea, so they are just as vulnerable to airborne
> poisons.  They do not rely on muscles to breathe, though, so curare
> might paralyze them but should not asphyxiate them.

I was wondering why it was the only insect with asphyxiation resistance.

> Tentacle _segments_ don't take air themselves, but they should suffer
> whatever ailments happen to the monster itself.

Okay.  Since krakens are affected by any damage taken by their
tentacles, removing asphyxiation resistance from tentacles should be
enough in the case of curare.  The same should also apply to eldritch
tentacles and their segments.

> For floating eyes, I assume them to take air via their surface, just
> like amphibians[0] and many invertebrates do.  Again, if the air is
> tainted, they will suffer -- from poison but not asphyxiation.
>
> [0]. Amphibians do have lungs, but if you cut them out they survive
> just fine, but painting them without obstructing lungs makes them
> suffocate -- they take a vast majority of air via their skin.

Okay.

> Half of these are mammals who are merely demonically altered.  Since
> they are still mostly mammals, I guess it's a safe bet to assume they
> should be vulnerable to whatever regular mammals are.
>
> For demons, well, we don't have them in RL so it's hard to tell
> anything -- but then, it's also impossible to tell it wrong as well.
> Since demons are generally portraited as mostly human, I'd say it's
> safe to assume they do breathe.  This means, they shouldn't resist
> either airborne poison if they don't resist poison in general, nor be
> immune to asphyxiation.

Okay.

The main question seems to be what kind of poison Mephitic Cloud really
is, compared to e.g. Poisonous Cloud.  It sounds as though the following
changes are needed (leaving out the current discussion on how
non-breathing undead are destroyed/dissolved/whatever by deep water):

1. Remove asphyxiation resistance from butterflies, kraken connectors,
kraken tentacles, and demons in general.

2. Make insects in general paralyzed but not asphyxiated by curare.

3. Add an unbreathing quality (a single-level non-random mutation for
players as previously mentioned, and an M_UNBREATHING flag for
monsters).  Having this quality implies asphyxiation resistance and
Mephitic Cloud immunity, but not poison resistance.

4. Apply the unbreathing quality to grey draconians, undead monsters,
plants, and non-living monsters.  Actually hardcode it for undead, so
that it properly applies to fake undead like Twisted Resurrection
abominations and zombie kraken tentacles.

5. Mention grey draconians' ability to walk through water separately.

(On an unrelated note, I've noticed that demonspawn and felid monsters
are both colored darkgrey; isn't the convention to use darkblue instead,
for those terminals with only 8 colors?)

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