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Old 03-30-2017, 11:07 AM   #11
KarlKost
 
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

Night Vision is what cats and owls have. Dark Vision is what vampires have. Its simple actually, it was never a problem to me
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Old 03-30-2017, 11:16 AM   #12
Flyndaran
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

Dark vision is vision without light, even though vision is defined as the detection of light. That's why some readers initially suffer confusion, I think.
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Old 03-30-2017, 11:41 AM   #13
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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Dark vision is vision without light, even though vision is defined as the detection of light. That's why some readers initially suffer confusion, I think.
There's an ambiguity here. On one hand, vision involves processes taking place in the eyes and the optic nerves that involve light. On the other hand, vision involves processes taking place in the occipital lobes that construct spatial imagery and don't directly involve light. Dark vision seems to be the latter without the former.
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Old 03-30-2017, 11:47 AM   #14
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

I'm surprised infra vision isn't mentioned
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Old 03-30-2017, 11:52 AM   #15
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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I'm surprised infra vision isn't mentioned
Infravision, Ultravision and Hyperspectral Vision seem to be a somewhat different group.
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Old 03-30-2017, 11:57 AM   #16
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

Ah. I've found it very common for Infra vision to exist in same categories as low light vision and dark vision. Also very common to see low light vision and infra vision as alternate a b ilities
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Old 03-30-2017, 12:24 PM   #17
Anthony
 
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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Originally Posted by whswhs View Post
There's an ambiguity here. On one hand, vision involves processes taking place in the eyes and the optic nerves that involve light. On the other hand, vision involves processes taking place in the occipital lobes that construct spatial imagery and don't directly involve light. Dark vision seems to be the latter without the former.
Hm. I realize there's some ambiguity. Dark vision means you can't see 'colors' in the dark. Does that mean colorblind, or does it also mean you cannot distinguish black from white? Because being able to distinguish anything specifically light-related in darkness is inherently supernatural.
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Old 03-30-2017, 12:41 PM   #18
Flyndaran
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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Originally Posted by whswhs View Post
There's an ambiguity here. On one hand, vision involves processes taking place in the eyes and the optic nerves that involve light. On the other hand, vision involves processes taking place in the occipital lobes that construct spatial imagery and don't directly involve light. Dark vision seems to be the latter without the former.
That seems like it would then include sonar as Dark Vision, which is not how I think most interpret the advantage's intent.
It's supernatural, so most such subtleties will have to be setting dependent anyway, I guess.
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Old 03-30-2017, 01:22 PM   #19
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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Originally Posted by Kalzazz View Post
Ah. I've found it very common for Infra vision to exist in same categories as low light vision and dark vision. Also very common to see low light vision and infra vision as alternate a b ilities
When I looked into this when writing Enhanced Senses, I found that the category of "infravision," including the standard Basic Set definition, is scientifically incoherent. On one hand there's near infrared, which occupies wavelengths just slightly longer than red light, and can be resolved to nearly as high precision, but you need extremely high temperatures to get NIR emissions; if the sun's below the horizon it will be nearly as dark in the NIR as in the visible. Living organisms don't emit meaningful levels of NIR. On the other hand there's thermal infrared, which homeothermic organisms do emitóbut which has much longer wavelengths and thus very low resolution; it's really more of a ranging and targeting sense than a "seeing" one. For one thing, it can't trigger chemical reactions directly; you need arrangements like what pit vipers have.

Since we don't see IR anyway, we tend to lump it all together. But there are real differences in what can emit different EM bands, and what kinds of physiological systems can detect them.
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Old 03-30-2017, 01:23 PM   #20
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Default Re: [Basic] Advantage of the Week (#38): Dark Vision, Night Vision

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That seems like it would then include sonar as Dark Vision, which is not how I think most interpret the advantage's intent.
It's supernatural, so most such subtleties will have to be setting dependent anyway, I guess.
Does sonar use the occipital lobes? Or does it use the acoustic processing systems in the temporal lobes?
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