Each week postliteracy.org presents visitors with a single image, which will often have multiple layers of meaning in its visual content. Embedded within that image, though, is textual content hidden through steganography. The audience must decode the hidden text […] in order to “read” the entire message.
And this sounds pretty new liberal artsy, doesn’t it:
Thus, each post at postliteracy.org requires polymodal literacy—here, visual, interactive, computational, and textual literacies—to decode its full meaning.
Helpfully, they link directly to the tools required to find the hidden messages.