Hi,

Having prepared and superimposed the binding pockets that I spoke of in my 
earlier email, I'm now trying to come up with a way of producing high 
resolution images of them.

The problem I'm now facing is that I can't seem to come up with a high-res 
rendering that clearly distinguishes between the inside and outside of the 
binding pocket. Well, that's not quite accurate. But I have three options I've 
been able to identify, all of which are less than ideal.

My first option is to use the standard rendering engine (i.e., no ray tracing). 
Problem: That severely limits my resolution and image quality.

My second option is to use ray tracing with double-sided lighting. Problem: The 
ray tracing, even more than the standard rendering, makes it all but impossible 
for the viewer to distinguish between the inside and the outside of the binding 
pocket.

My third option is to use ray tracing with single-sided lighting. Problem: The 
"protein" side of the binding pocket then comes out as an unsightly solid black 
colour.

I've tried to install POV-Ray on my Mac, to no avail. I downloaded and 
installed version 3.6 from the POV-Ray web site, but when I tried to run the 
executable, it unceremoniously carked it. Also, it didn't place an x-povray on 
my command line, nor in the POV-Ray directory, that I could find. So unless 
I've overlooked something, that avenue is closed to me. I'm loath to try 
compiling POV-Ray from source.

Having said all that, is there a known way to generate images that are (a) 
high-resolution, (b) lit up (at least to an extent) from both sides, and (c) in 
such a style that it's easy for a casual viewer to distinguish the inside from 
the outside?

Thanks,
Ben

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