Sorry, cmcc - I'm the last person capable of solving other's problems, being struggling with my own. Hope more experienced renderers can help. 

 Thanks, guys. I can now access EnSphere. I got in such a tangle with the original image that I've trashed it and am now starting from scratch - applying your generous guidance. 

Sorry, I misquoted: the manual actually says (P121):

"Macintosh users can simply unpack the downloaded files, and install them according to your needs. Windows users can use the auto-install option, as described below:"

 I downloaded BB's envirosphere to my desktop - where a folder appeared titled 'runtime'

I consulted the Ref Manual, and opened my wip Poser8 project and clicked the 'Add Library' button at the top right of the Library palette.

When the 'Choose a folder' window opened, I steered to my desktop and clicked on the 'runtime' folder.

A window opened saying 'This does not seem to be a runtime folder - please choose another'

So then I went through the process again, but this time, when the Choose Folder window opened, I opened the runtime folder and selected in turn the folders inside named 'libraries', 'materials', 'props', and 'EnvSphere'. Each evoked the same rejection message.

The manual helpfully mentions that while the library item loading process is automated for PC owners, Mac users can "open and load from their desktop in the normal way"

Huh!?

I hope you can help, hbore :o(  

(I just might have bitten off more than I can chew with this golden statue concept)

 Sorry to bother you again, but I've downloaded your EnvSphere, and can't get my Poser8 to install it. It keeps telling me that the file does not seem to be a runtime folder. 

The Ref Manual seems to ignore Macs, but I've tried every way I can - and still get the same message. Can you help?

I've also downloaded a room interior (a simple room) and that installed okay - just by clicking on the Add Library button and choosing the file from my desktop.

Many thanks.   

 Thanks, all. I'm fit enough to have another go. now. 

However, above is the resulting preview....

 Okay, a slight snag is that I'm doing a figure, not a bowl, and I'm having to repeat your parameter gold formula for the body, the head, the lips, the inner mouth, the teeth...and umpteen other body parts. Is there any way I can command that the same parameters be applied to all parts??

 I'm following you every step of the way, BB. And I'm going to do all that now. Wish me luck - and many thanks. 

 Thanks, Sam. 

And while I'm taking up your time, can anyone tell me why switching to some cameras makes the figure's eyeballs and teeth fall out most horribly? Is there any way I can retain the integrity in all camera views?

A million thanks for your help.