On 1-11-2014 1:26, Bald Eagle wrote:
> Can you tell me to find a good introductory example of incorporating HDRI probes
> into POV-Ray scenes is?
> What makes a "good" probe?
> Can I make my own HDRI probes with POV-Ray?

Answer #1:
This is an example of a HDRI probe sky sphere. You can use .hdr or .exr 
formats. The latter is best I believe:

   sphere {
     0, 10e3
     texture {
       pigment {
         image_map {
             exr   "HDRI maps\SM_HDRI-Pack3-24.exr"
             map_type 1
           once
           interpolate 2
         }
         rotate Sun_azm*y
       }
       finish {emission 1 diffuse 0}
     }
     hollow
   }

Answer #2:
Not sure but any probe with a well-defined light source areas will do I 
believe. I leave this answer to the specialists here though ;-)

Answer #3:
You can find ready made probes for instance here:
http://smashmethod.deviantart.com/art/High-Res-HDRI-Map-Pack-1-9597501
There are three packs in total. If you want, you can the .hdr maps into 
.exr maps using Ive's IC application.

You can also make excellent sky sphere panes using Terragen Classic and 
just render the sky, not the landscape. The rendered panes can then be 
composited into probes with the help of Ive's TerragenSky_v2.inc macro. 
It's been a long while since I used that but it gives excellent results. 
Note: this only works with Terragen Classic, not with Terragen 2.

Thomas

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