This is a long post with a dozen screenshots and an explanation of my experience. Hopefully this helps some of you out in finding items.
This is the first item I found. You can't see items unless you're fully zoomed in, or zoomed out by one click. This picture is zoomed out by two clicks...
[image: i7.photobucket.com]This is zoomed out by only one click. The Silver Ring is barely visible.
[image: i7.photobucket.com]And this is fully zoomed. It was still hard to pick out while scrolling around on its own.
[image: i7.photobucket.com]This one was also hard to see. Greyscale on greyscale
[image: i7.photobucket.com]And this was the third item. All three were found at the same time, as it seems that everyone was given three randomly generated items to start with. This was also the only of the three that was easy to spot, a First Aid Kit. This was a blessing, as I had spent at least half and hour up until this point carefully combing over the city map and my eyes were starting to hurt.
[image: i7.photobucket.com]I then read many parts of this thread and read about the highlighting and decided to give it a go. While I didn't expect to find anything, to my surprise, I found three more items on the map. You probably can't tell from the screenshot, but this is a Lollipop. The box the item image is surrounded by is a not only a differet shade of blue, but it's odd shape help it 'pop' out of the page while you're scrolling around.
[image: i7.photobucket.com]When I found this item, I decided to show what they looked like both highlighted and unhighlighted. To me, this is a pretty good showing of how effective the highlighting can be because without the highlights, I'm not sure I would have been able to seen this one. On the roof of this building is a Jaguar Plushie.
[image: i7.photobucket.com]If you thought that was easy to spot, good on you, but I don't think I would have caught it. Highlighted, on the other hand...
[image: i7.photobucket.com]...the image pops out nicely. And to restate, moving the camera around helps the eye notice the irregularity in the shape, probably more than the still image does.
[image: i7.photobucket.com]This one I think anyone could have found. This Script of the Quran is mostly a solid block of color at this size and sticks out on its own.
[image: i7.photobucket.com]But I found it highlighted. And this was the sixth and final item from my second run. This run, not counting the time I stopped to take the screenshots, took about five minutes. Compared to the 30-45 minutes from the first run, it was a remarkable improvement. I posted here about the results and decided to try one more time.
[image: i7.photobucket.com]If memory serves, this was found at the top of the map and I had started in the opposite corner at the bottom. I had zipped through the map pretty quickly compared to the second run and was still able to catch this S&W Revolver.
[image: i7.photobucket.com]This one would have been able to be spotted without highlighting, due to the white on the grey, but it was still very easy to spot while highlighted.
I would like to add a speculation. I use a lot of LSD, which gives a "massive" boost to Awareness. I was not expecting to find 7 items in my first three runs. While the first three items were given to everyone, the next four had to be spawned. I'm wondering... are three items the max one can find on a map at any given time, and if so, if you're "due" to find additional items, if they are kept in a spawn queue? All of these items were found in about 2 hours. Days before RESPO was released, my city find dried up entirely and I did not know about the change to this system. I could be enirely wrong, but I'm curious about the circumstances other people had leading up to the RESPO release and the aftermath. Do items build up or do they vanish after a certain amount of time?
Anyways, I hope this helps you all in your city map item hunting. At first I thought I would hate the easter egg-style hunting, but highlighting the screen brings the hunt to a more reasonable amount of time and effort expenditure and I might even enjoy it a little.