attached pic sizing
you can't blow up a photo that's already been reduced down and "gain much." Best thing is when the poster has a high res photo posted off this site which you can "go see" "over there" on the whatever other host site
Also, this site software seems to screw with photos on it's own. This changed somehow, I don't know why
Here's an example.
Flickr actually used to "work." This has changed as Yahoo "improved" Flicker until it was nearly unusable. In any case, this page automatically takes the native photo and scales the photos into several sizes
https://www.flickr.com/photos/18786943@N03/6043395212/sizes/l
the BEST way to display a photo on any site including this one is NOT to use the site upload attachment "thing" but to rather simply link the photo from somewhere else
Here's the smallest photo from the page linked above
https://www.flickr.com/photos/18786943@N03/6043395212/sizes/sq/
and on Flicker, you can "right click" the photo itself and gain the native URL like this
https://c1.staticflickr.com/7/6133/6043395212_e13bbe895b_s.jpg
and adding the photo tags when posting, get it to display like this
and of course you can do the same with larger ones
And larger, 640 X pixels
Now to show you "what you are missing," click this link, which is the original photo uploaded to Flicker. I took this downtown, at the local beach, one noon
https://c1.staticflickr.com/7/6133/6043395212_527b45d3cd_o.jpg
The point is you CAN blow up a photo, but it "depends.............."
Your computer / display / browser settings, and how big the display is. You can't expect smart phones to "do everything."
If the photo is low resolution, you can use software to blow it up, but it won't show you much detail. Just a lot of blurred "noise."
The BIG thing is, that people who want to show DETAIL need to learn to crop that out of a photo, and show just that part. For example, if I take the largest photo above, to some little detail, I can crop that out and upload it somewhere like tinypic, photobucket or a bunch of other places, even flickr, or even upload it here as an attachment
Now, to see what the above shot REALLY looks like, open this link directly in a second browser. If you display them side by side, you'll see that THIS SITE slightly magnifies the image as compared to a "native" browser view, and that alone makes it just a bit more blurry
http://i64.tinypic.com/2e5jvk7.jpg
Here is a screenshot to show this. The photo on the left is "as displayed" by this website, that is shot before this last edit. The one on the right is displayed in the browser as uploaded to tinypic, here.............
http://i64.tinypic.com/2e5jvk7.jpg
http://i66.tinypic.com/29yje45.jpg
As you can see this gets somewhat complicated, the interaction between various websites, software, and so on