Yantras(or not)...

So, just in case the image header on my previous post didn't give it away, I am fully back into making 'yantras' with my photos. After a brief lapse in yantra creation (and I still need to do some tinkering in the photoshop actions department...) I've come back with some really cool images that reminded me why I became so obsessed with the yantras in the first place.
I'm not overly sure that they are 'yantras'... I use them as a meditation tool, and they do have a central focal point, but I'm not sure if there are set rules about what can be designated a 'yantra' or not... I'm almost certain there are, but I like the idea of using the images as meditation tools, and I like the word yantra so I'm going to continue calling them that until I don't anymore.