I'm looking over the cookbook docs and trying the recipes on my own dataset in prep for the release. I don't really understand the "Image Background Colors" recipe at the end of: http://yt-project.org/docs/dev-3.0/cookbook/simple_plots.html This just shows various gradients, but is the purpose to show that one can plot their data over one of these gradients? If so, perhaps we can add some data to one of these? Mike -- Michael Zingale Associate Professor Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY 11794-3800 *phone*: 631-632-8225 *e-mail*: Michael.Zingale@stonybrook.edu *web*: http://www.astro.sunysb.edu/mzingale