Okay. So I can give you a bit of advice regarding HP Reveal (just submitted my 2nd, after gloriously failing on the first).
HP Reveal uses "trigger images" and "overlays". Let's say you create a little animation (can be a short video or gif) and you want people to scan a picture which then "comes to life". This is what HP Reveal offers you.
There is an option to do a so-called "campaign", where scanning an image unlock a second one (or third, think of it like stages of a multi cache). If interested, I can provide you with information on the campaigns, it's not activated for every user. But you should first try out creating an "aura" (trigger + overlay that is).
A few more things to consider:
- using real life images (e.g. photos of a statue) has huge downsides. Make sure pictures are good, take different angles, consider different weather and: shadows. If shadows fall on your object it becomes almost impossible to scan.
- don't make it too complicated. Maybe give users one or two "stages" to train and get themselves familiar with everything.
- different phones have different cameras and therefore a different image distortion (that is angle of the picture). It works well with many phones, but some people may have problems.
As soon as my AR_cache comes live, you may find it here: coord.info/gc80gkm
It's in German, but anyone can play it (at least the first stages), by simply following the first link in the listing (leading to HP Reveal, then click "follow" and try scanning the pictures in the listing).
Now I have 8 indoor stations that can be solved at home (a digital image is less prone to real life conditions) and one simple graphic on a sticker outdoors.
If anyone needs more information just ask. :)