Hi Renyue,<div><br></div><div>Which version of yt are you running?  If you installed using the install script, the output of &#39;yt instinfo&#39; run on the command line should be suffieicebt to figure out exactly which version you are using.</div>
<div><br></div><div>You may have to directly import AMRKDTree from yt.visualization.volume_rendering.api, although I believe it is still imported into yt.mods in the current stable release of yt.</div><div><br></div><div>
Nathan<span></span><br><br>On Saturday, March 29, 2014, Renyue Cen &lt;<a href="mailto:cen@astro.princeton.edu">cen@astro.princeton.edu</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi folks,<br>
<br>
Some time ago John Wise kindly gave me a yt script that uses AMRKDTree to speed up &quot;camera&quot; 3-d<br>
rendering, it worked very well and fast (takes like a few minutes to do a rendering of a galaxy with 2048x2048 pixel).<br>
It looks like<br>
<br>
volume = AMRKDTree(pf,   le=le,   re=re,  fields=[&quot;Density&quot;],   no_ghost=False)<br>
<br>
then used in<br>
cam = pf.h.camera(c, L, W, (N,N), tf, volume=volume, no_ghost=False, north_vector=Ldm,steady_north=True)<br>
<br>
It appears that yt has evolved and the &quot;volume ...&quot; statement no longer works.<br>
Is there a solution to that in the newer version?<br>
<br>
Alternatively, is there another speedy way to do 3-d rendering?<br>
<br>
Thanks very much,<br>
Renyue<br>
<br>
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</blockquote></div>