I made these and you can certainly use the idea to create a set of these elevation or depth markers for any rpg. I've seen other markers for $10 each and these cost about $2.00 each to make. You can see the preview here.
I'll be detailing the process and materials list in an upcoming post on my blog, so be sure to check it out.
thanks and hope this inspires you to create your own!
-david
d4d6d8d10d12d20 - My Game Blog
