I made acquaintance with one old horror 3d shooter some time ago, called "Undying". (It is said that scenario is written by "famous horror-writer" Clive Barker, but frankly its first time I hear this name <!-- s:) --><img src="{SMILIES_PATH}/orc2.gif" alt=":)" title="Smile" /><!-- s:) --> )
Well, anyway, this game features interesting things, like "hidden" images and objects (usually just decor). These objects are either not seen at all normally or seen... well, in more common way than they really are. There's a special spell that helps to seek for nearby monsters in the dark, it also allows to see the true entity of these objects.
I just wondered maybe we could use this idea somehow.
Here are couple of samples:
[img:33hqa0tr]http://downloads.orcishweb.com/koraxdev/crimson/temp/Undying1_normal.jpg[/img:33hqa0tr][img:33hqa0tr]http://downloads.orcishweb.com/koraxdev/crimson/temp/Undying1_scry.jpg[/img:33hqa0tr]
[img:33hqa0tr]http://downloads.orcishweb.com/koraxdev/crimson/temp/Undying2_normal.jpg[/img:33hqa0tr][img:33hqa0tr]http://downloads.orcishweb.com/koraxdev/crimson/temp/Undying2_scry.jpg[/img:33hqa0tr]