Hiya Mike, always good to see you here at the POV-Ray newsgroups. Saw you 
were posting plenty of stuff-- seems so when I go plowing through reading 
and looking. By the time I stop to write something I'm too exhausted to 
think after scanning a hundred or more messages in under half hour each 
time.
For example, I was always going to say something about Samuel's jasper 
mineral rendering from months ago and never got back to it. He keeps putting 
something new out there so often I can't keep up, or Ive slowed way down. 
Probably both.

I got a look at your tropical moonlit scene using this volcanic plume. 
Already forgetting how it compares to this earlier one. I watched this 
animation loop many times and I got to thinking it might not be a dense 
enough ash cloud. I would expect the edges to be as opaque as the central 
part. That's probably why I kept seeing it as more of a smoky thing than 
ash, that and the fast rate of flow casues me to see it as smaller than 
maybe otherwise intended to be. Makes me think of high-speed video of a 
chaotic eruption because I see it as a very large mountain.

Always some great stuff being done so I wanted to stop and say so once 
again.

Bob

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