Thanks. I can see how this works now.

Am I right in thinking that every light in the scene becomes an IDL light ?
Or does P8 'lose' things like spots.

Also 4 quick questions...

In the image here there are blotches. What causes these and how can they be removed?

2nd one is if I use one of the original P7 IBL light sets that included in P8, what does P8 do with the image that you use to create the light with? Does it ignore it or does it do something else.

I ask because I wonder if it's possible to do this.

Add a background photo in poser. Use the same photo to make a 'probe' which in turn helps make an IBL light set.  Using that "light" and render in IDL. would that give a light that matches the original photo better than it would in P7 with IBL.

Final one :) Render times.  Using various light sets including the P7 IBL ones the render times where'nt too bad.  But when I used the P8 light with a gel and IDL, the render took age. About 4.5 before I gave up and it had only done about 80% of the image.  So can this long delay be avoided?

  

Pinky - you left the lens cap of your mind on again.