What is going on with a rogue in the middle of a fireball who evades damage?

[Psyren]

Yes, doesn't need -because, when Skeleton is beyond the Darkvision range, it doesn't matter anyway, and when Skeleton is withing the range - it's already too close for checking

Possible - in the morning and evening

Weather observations.

Why?

Zombies are rotting, rot is exothermal process

1) Drow Darkvision can go up to 240' and they can see those skeletons just fine.
2) Exactly - your theory doesn't work.
3) What page of the DMG has those?
4) Because you said it would be "visible for miles" but provided no citation.
5) Not frozen ones.

[Stealth Marmot]

The whole "What is Darkvision?" thing seems like an excellent thing to start a new thread about.

But we all agree that Darkvision isn't the equivalent of IR vision, right? ShurikVch is just being silly, right?

Technically...they could work on the same principle, considering that night vision often works on the idea of adapting existing radiation that is off the spectrum of normally visible light to instead be visible, and intensifying that and what is already available. In other words, night vision goggles actually do use infrared light to supplement the light on the normal visible light spectrum in order to make everything visible to your eyes. Thermal vision works by seeing infrared light as a measure of heat, then uses the heat difference between the foreground and background to build an image. Darkvision is the former, Infravision is the latter, supposedly. Techncially both use being able to see in the infrared spectrum.

So can a dragon see a skeleton standing in snow? Yes. Will he have to make a spot check to do so? Yes, but they have insane spot checks so a dragon likely would have to roll a -7 on the die to fail, and last time that happened time and space folded in on itself, I heard a loud popping noise and a pissed off guy named Larry showed up, said he was from the "Ontological IT department" and asked us to turn reality off and back on again.

Point is, DM can decide where a spot check is necessary to see someone who isn't trying to hide, that's why we have them.

[Larrx]

The whole "What is Darkvision?" thing seems like an excellent thing to start a new thread about.

But we all agree that Darkvision isn't the equivalent of IR vision, right? ShurikVch is just being silly, right?

I think we all do (and ShurikVch is being exceptionally silly), but IR radiation is actually way more complicated than a simple measure of a bodies temperature. Different substances absorb different wavelengths of IR radiation (which is why IR spectroscopy is totally a thing) in a kinda, but not really, similar way to how they absorb certain wavelengths of visible EM radiation. So if the IR detection was sensitive enough you could totally pick out different objects at the same temperature.

Of course, you could distinguish them because they'd be different colors . . . so still not Darkvision.