Sometimes you don't describe. You just look. Grab your camera and head to 600 St. Mary's Road. It's on the northeast corner of St. Mary's Road and the I-10 frontage road. Here's the map to the mural, just don't forget your camera.
Artists: Josh Sarantitus and William Wilson
There are more photos in Ooh... Ahh... More Oury Park.
UPDATE (October 6, 2014): The mural is made from mosaic tiles, and they're falling off. Have a look at the 2014 version of the last photo above.