Kwadd you're full of shit ... a 20 inch monitor is 16 inches by 12 inches or 400 square inches ... at 900 Pixels per inch your resolution is 480 x 360 ... 1600 x 1200 is 4800 Pixels per inch ... Edit: I was talking about "Pixels per Square Inch" in my initial posting because that is the only measure I have seen relating to an eye's ability to see. Edit 2: The reason the standard PPI is not used for this is because it is not as well defined 1,000,000 X 1 in a 1 inch square is still 1,000 PPI in the standard PPI measure ...

16x12= 192 square inches. NOT 400. 1600x1200 on 20inch... you have 10,000pixels per square inch. 192*10,000=1,920,000 EDIT: 192 units of 10,000 pixels. 1600x1200=1,920,000 EDIT: 1,920,000 pixels total. Wanna learn some math? EDIT: I am useing a single axis of it. so 300x300. Or 90,000 pixels per square inch. EDIT2: So my HDTV running at 57.6x57.6 = 3317.76PPSI So 1920x1080 is over 4x what you said it needs to be for a 40inch screen.

Sorry Kwadd ... was initiall doing a 60 inch (wide) screen and screwed up the math when I substituted in the new number... but my point still stands that your numbers were BS to what I had said Edit: Sadly enough, I have a pure math degree Much like every professor I know I can do Analysis in an infinite dimensions but have difficulty with basic arithmetic

If you go up and read the edit on my last post... EDIT2: So my HDTV running at 57.6x57.6 = 3317.76PPSI So 1920x1080 is over 4x what you said it needs to be for a 40inch screen. Just to let you know... Your still wrong. EDIT: I know that feeling... :P You also gotta rember the distance this is being viewed at. With a 40 to 60 inch screen your looking at being 5-10 feet away from it. My father in law has a 52inch, and he sits 10 feet from it. PPI is not everything... distance/size matters too. A 20inch screen needs a higher PPI because you will be closer. a bigger screen dont need it. Rember. If it looks good on a 75foot screen. How big of a difference would you see on a 40 or 60inch screen?

I said 10,000 Pixels per square inch ... 3317.76/10,000 = 0.331776 ... You can still see better than that

At what distance is that at tho? 6inches from you? 12 inches? 24inches? becuase 10,000 ppsi @ 6 inches... is like... 2500ppsi at 24inches.... EDIT: 10,000PPSI @ 24 inches is give or take, the limit of my vision. (my monitor) So at the 80inch number. 2500PPSI is more than enough.

I really have no clue ... It dealt with print images ... 100x100 pixels per inch ... not to be confused with DPI (because several dots are necessary to get the correct colouring per pixel) ...

100x100 pixels per inch is HORRIBLE. that is a CRAP image for a photo. I will not print a 8x10 unless I can get 300x300. My 10.2 MP camera helps. (it is not a crap point and shoot camera. The image blurs from one pixel into the other because of the lack of focus. Because of that some cameras that sell 6-10mp cameras are bogus. I'm looking into buying a 800$ lens to make sure I dont have the same focus problems I have now. However looking at a screen that big... 52ppi is all that is needed. Especially when you consider the viewing distance. (when you can have a lower PPI for a 8x10) Because when you look at a 8x10 it is further than 6inches away. Like I say. I know ALOT about this. A 30x40 poster, only needs ~75ppi.

I don't really know Kwadd ... I know Magazines tend to have amazingly low resolutions but I was thinking about it and either I'm remembering what I have read before incorrectly or it was incorrect in the first place ... I do know that a person with 20 20 vision can see the difference between 1600x1200 and 1920x1440 on a 20 inch monitor ... HD is (no where) near the limit of your visual range, but is (probably) close to the practical limit

You can tell the diffrence between 1600x1200 and 1920x1440 by looking at a white/black line, looking at it on a LCD it is a perfectly crisp dots. It makes them stand out alot more. If you take a grey scale line, from one side of the screen to the other, and you cant tell a diffrence from the colors changeing across the screen. That is all you need. I can not tell a 'picture' diffrence from 1280x1024 and 1600x1200. (in picture quality) A sharp line, you can tell the diffrence. However that is rare in movies/real life. As games evolve in the future. there will be less. "straight" lines that that is visible. how big of files can your e-mail support?