Inverted Colors
One of the effects that I like playing around with is the inverted colors. I think it lends a really cool effect especially on religious deities. I've tried it out on a few Hindu images and i must say that it brings a lot of mysticism to the image compared to the original.
Here's my avatar that i inverted the colors on. So interesting that i forgot i added stubble to the avatar but you can't really see it in the original but with inverted colors it becomes really clear.