[yt-users] Volume rendering issues

[Mike Butler]

Hello,

I am trying to make a movie of my data using the off-axis projection
recipe in the cookbook.   The idea of what I am trying to do is make a 3D
movie of my data rotating around an axis.   The script itself is located
at the end of the email.  When 'n' is 0, the projection looks normal, but
when L should be [0.1,0.5,1.0] and for the following steps, I get images
that look like this: 
http://www.astro.ufl.edu/~butler85/images/frame_0001.png   which has what
looks like strange bars running across it. Thanks in advance for any
help/suggestions.

-Mike

for n in range(11):
   ...: 	pf=load("Cloud_128AMR4StarsFUV_0101")
   ...: 	tf=vr.ProjectionTransferFunction()
   ...: 	pf.field_info["Density"].take_log=False
   ...: 	c = [0.5,0.5,1.0]
   ...: 	L=[n*0.1,0.5,1.0]
   ...: 	W=0.8
   ...: 	Nvec = 512
   ...: 	vp=pf.h.volume_rendering(L,W,c,Nvec,tf,whole_box=True)
   ...: 	vp.ray_cast()
   ...: 	image=na.log10(vp.image[:,:,0])
   ...: 	iw.write_image(image,fn % (n))