Hi Lile, As the message suggests, the allsky_projection function is not implemented in yt-3.0. We're actively refactoring the volume rendering module in yt, and one of the goals is to unify the different cameras for rendering images (plane parallel, fisheye, HEALpix, etc.), but this is not yet working. It is expected to be added to the main line in the next 2-3 months. Until then if you want to access the all sky projection functionality, I recommend you use the previous version of yt: 2.x. For more information about how to get yt-2.x, see here: http://yt-project.org/docs/dev/installing.html#switching-between-yt-versions For documentation on yt-2.x (including the all sky projection information), see here: http://yt-project.org/docs/2.6/ I hope this helps! Cameron On Tue, Nov 4, 2014 at 1:27 PM, Lile Wang <lilew@astro.princeton.edu> wrote:

Hi All,

I got something wrong when I was trying to generate the allsky_projection map in yt-3.0, by receiving an exception "NotImplementError".

Any idea about what happened? Thanks in advance.

Cheers, Lile

----------------------------------------------------------- Lile 'Patrick' Wang Dept. of Astroph. Sci., Princeton University, NJ 08544 USA Website : http://www.astro.princeton.edu/~lilew/ Tel (Mobile): +1-(734)-834-3936 Tel (GVoice): +1-(510)-926-6831 -----------------------------------------------------------

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-- Cameron Hummels Postdoctoral Researcher Steward Observatory University of Arizona http://chummels.org