Posted by
CmdrTaco
on from the hardware-to-lust-after dept.
BlackHat linked us to IBMs
Deep View, a
research system for rendering and other advanced applications (Q3A). The
PC is 8 Linux boxes in a rack, which is needed to generate the content for the
T221 display which operates at 3840x2400.
This is a software solution
by
ObviousGuy
·
· Score: 1, Insightful
Not an OS solution. Linux is peripheral to the whole article.
-- I have been pwned because my/. password was too easy to guess.
Re:This is a software solution
by
ObviousGuy
·
· Score: 2, Insightful
I knew I misphrased that as soon as I hit submit. This is an advancement in algorithms (hardware-based in this case), rather than any special functionality of an OS.
-- I have been pwned because my/. password was too easy to guess.
um, you can't expect the actual textures to look better just because they are shown with better resolution (in fact, quite the opposite). the "point" is that you can run it in real time with that resolution, and make software that has high enough resolution textures and looks really good. It's kinda like bumping your monitor resolution to 1600x1200 and expecting old DOS games to look better as the result.
I've gotta call bullshit there. The only case where lighting would have any effect on the perception of a CRT would be its intensity, and even then its effect would be indirect.
Your eyes are much more sensitive to flicker in the periphery than looking dead on. If the room is very bright, your eyes will be less dialated, and you'll be less sensitive to the flicker of your monitor.
Artificial light does have it's own flicker component, but that won't interfere with a crt because it doesn't depend on the reflection of that light for its operation. Now if you take an HP48 calculator, you will probably notice some flicker in rooms lit mostly with flourescent lights. The refresh on flourescents (in the US anyway) are close to the refresh of the reflective lcd on the HP48, hence the banding.
Another big factor on flicker is the rate of decay of the phospher elements in your monitor. The slower the glow decay, the less likley you are to see a flicker--the pixel is still glowing from the last time it was hit, when it is struck again. The longer this decay, the lower refresh rate you can get away with from a flicker point of view.
However, now you suffer from smearing or stuttering (sometimes called ghosting). The optimal setup would be a phospher coating with nearly infinite decay rate, operating with an infinite refresh rate.
Television, here in the US is refreshed at something like 30Hz (non hdtv). The reasons you don't see the flicker are: 1) slow decay rate of the phospher. 2) you are usually 5 or 6 feet away from a tv when you are watching--so it isn't in your peripheral vision. 3) While big screen tv's are getting more common, most people are still below the 36 inch mark, which also means it is mostly in your non-peripheral vision.
Try this: Go up to like a 13 inch tv or something small like that, turn it on to some show that has a lot of white to it. Stand about 1 foot or so away, and look just above the TV. I guarantee that you will see flicker. Some people are more sensitve to flicker than others, and it will depend a little on the TV, but at 30hz, I imagine everyone in the world can see it.
LCD--I think all of the consumer LCDs out today suck as far as pixel decay. I don't know the reason, capacitance maybe, but they suck. Much slower decay than CRTs. On many LCDs today, you still can't tell if you have "mouse trails" turned on or off (in ms windows). So that is why you don't see flicker as much at such low refresh rates on LCDs. There may be other reasons too... I don't know.
Slashdot Mirror
Not an OS solution. Linux is peripheral to the whole article.
I have been pwned because my
um, you can't expect the actual textures to look better just because they are shown with better resolution (in fact, quite the opposite). the "point" is that you can run it in real time with that resolution, and make software that has high enough resolution textures and looks really good. It's kinda like bumping your monitor resolution to 1600x1200 and expecting old DOS games to look better as the result.
sic transit gloria mundi
I've gotta call bullshit there. The only case where lighting would have any effect on the perception of a CRT would be its intensity, and even then its effect would be indirect.
Your eyes are much more sensitive to flicker in the periphery than looking dead on. If the room is very bright, your eyes will be less dialated, and you'll be less sensitive to the flicker of your monitor.
Artificial light does have it's own flicker component, but that won't interfere with a crt because it doesn't depend on the reflection of that light for its operation. Now if you take an HP48 calculator, you will probably notice some flicker in rooms lit mostly with flourescent lights. The refresh on flourescents (in the US anyway) are close to the refresh of the reflective lcd on the HP48, hence the banding.
Another big factor on flicker is the rate of decay of the phospher elements in your monitor. The slower the glow decay, the less likley you are to see a flicker--the pixel is still glowing from the last time it was hit, when it is struck again. The longer this decay, the lower refresh rate you can get away with from a flicker point of view.
However, now you suffer from smearing or stuttering (sometimes called ghosting). The optimal setup would be a phospher coating with nearly infinite decay rate, operating with an infinite refresh rate.
Television, here in the US is refreshed at something like 30Hz (non hdtv). The reasons you don't see the flicker are: 1) slow decay rate of the phospher. 2) you are usually 5 or 6 feet away from a tv when you are watching--so it isn't in your peripheral vision. 3) While big screen tv's are getting more common, most people are still below the 36 inch mark, which also means it is mostly in your non-peripheral vision.
Try this: Go up to like a 13 inch tv or something small like that, turn it on to some show that has a lot of white to it. Stand about 1 foot or so away, and look just above the TV. I guarantee that you will see flicker. Some people are more sensitve to flicker than others, and it will depend a little on the TV, but at 30hz, I imagine everyone in the world can see it.
LCD--I think all of the consumer LCDs out today suck as far as pixel decay. I don't know the reason, capacitance maybe, but they suck. Much slower decay than CRTs. On many LCDs today, you still can't tell if you have "mouse trails" turned on or off (in ms windows). So that is why you don't see flicker as much at such low refresh rates on LCDs. There may be other reasons too... I don't know.