Here is another test, this time using the plain Ice texture.

Compare the icicles to the images below:
http://www.greatsouthernstudios.com/shop/images/individual%20icicles.jpg
http://3.bp.blogspot.com/_zIXvakIhsHg/TOvu1-KyeGI/AAAAAAAAAOc/WxruU-mKlkk/s1600/icicle.jpg

This one I have not implemented yet, but since I now see it is possible, I  
will allow this:
http://www.eyeker.com/photogallery/Winter2004/Icicle90145.jpg

I have another test I am rendering which I will post as a follow up.
Here are the stats for that image:

Render Statistics
Image Resolution 640 x 480

Pixels:           307840   Samples:          440568   Smpls/Pxl: 1.43
Rays:            3642904   Saved:            758077   Max Level: 195/256

Ray->Shape Intersection          Tests       Succeeded  Percentage

Blob                           4774138         2976928     62.36
Blob Component               645177822       320893086     49.74
Blob Bound                  2140957151       976546698     45.61
Plane                          5483388         1736065     31.66
Torus                          4590207         1252790     27.29
Torus Bound                    4590207         2496688     54.39
Bounding Box                   9493288         8194998     86.32
Light Buffer                   9872820         9085769     92.03
Vista Buffer                   1643874         1426520     86.78

Roots tested:               6796257   eliminated:              1385936
Calls to Noise:             2758481   Calls to DNoise:        32532091

Shadow Ray Tests:           4406720   Succeeded:               1392478
Reflected Rays:             1885924   Total Internal:           350633
Refracted Rays:             1316412

Smallest Alloc:                  18 bytes
Largest  Alloc:             6042856 bytes
Peak memory used:          19415958 bytes
Total Scene Processing Times
   Parse Time:    0 hours  0 minutes 42 seconds (42 seconds)
   Photon Time:   0 hours  0 minutes  0 seconds (0 seconds)
   Cloth Time:    0 hours  0 minutes  0 seconds (0 seconds)
   Mechsim Time:  0 hours  0 minutes  0 seconds (0 seconds)
   Render Time:   0 hours 39 minutes 54 seconds (2394 seconds)
   Postpr. Time:  0 hours  0 minutes  0 seconds (0 seconds)
   Total Time:    0 hours 40 minutes 36 seconds (2436 seconds)
CPU time used: kernel 1.22 seconds, user 2412.70 seconds, total 2413.91  
seconds
Render averaged 127.26 PPS over 307200 pixels

Feel free to send me a scene to "snow" on; I need to do a usability test  
on this thing with code which deviates from my established patterns.

Ian

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