Monster cloud interactions

[amaril]

Is there a set of rules for how monsters act in regards to harmful clouds? I know undead walk into clouds and most intelligent monsters avoid them, but there are exceptions to this rule: I've recently found that yaks are willing to walk into conjured flames. Why? Will they always behave this way?

[ontoclasm]

Monsters of low enough intelligence always step in, and I believe monsters with negative resistance to the cloud's type never do (e.g. ice beast and fire cloud), but barring that they roll some dice each turn to see if they have "enough" HP compared to the cloud's damage. Yak HP is right in the area where some turns they feel tough enough to survive a fire cloud and sometimes they don't, so that's why they often hesitate at the edge but then eventually go in. Compare to death yaks, who have enough HP that they'll always(?) enter, and goblins, who have low enough HP that they never(?) will.

[Eyesburn]

don't cast cloud between you and pack of monsters,
first cast it on top of dudes, then between you and pack, then step back, that will force them to move towards you walking through the cloud

[4Hooves2Appendages]

With some monsters, notably Yaks, it can be best not to damage them from range, so that they walk into clouds more readily.

[duvessa]

Monsters of low enough intelligence always step in, and I believe monsters with negative resistance to the cloud's type never do (e.g. ice beast and fire cloud), but barring that they roll some dice each turn to see if they have "enough" HP compared to the cloud's damage. Yak HP is right in the area where some turns they feel tough enough to survive a fire cloud and sometimes they don't, so that's why they often hesitate at the edge but then eventually go in. Compare to death yaks, who have enough HP that they'll always(?) enter, and goblins, who have low enough HP that they never(?) will.

Monsters that are already in a harmful cloud will freely walk into different harmful clouds, even ones they would never normally walk into (miasma, ice beast with 1 HP into flame cloud, etc)

[Rast]

Will a cold-immune freely walk from freezing cloud into flame cloud?

[duvessa]

No, because the freezing cloud is not a harmful cloud. But something with rC++ will.