"Edouard" <pov### [at] edouardinfo> wrote:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
>
> > This HDR is one of the few I have found that have a full brightness sun in it vs
> > one that crops out at a lower value.  This particular HDR is from Bernhardt Vogl
> > (http://dativ.at/lightprobes/index.html) Direct Evening Sun - Schoenbrunn
> > Vienna.
>
> Feel free to give it a test with one of mine:
> http://s3.edouard.info/te-atatu-sunset-1.hdr
>
> Overcoming the Bright Point Lightsource problem is one of the biggest issues
> I've had with light probes, so it's fantastic to see your work on it!
>
> (My hack was to delete the sun from the image, generate a light dome, and then
> manually added a light for the sun in by hand. Worked well, but I only ever did
> it for that particular HDR...)
>
> Cheers,
> Edouard.

Thanks.  Yes, this is something I've thought about for a while and finally
decided to give adaptive subsampling a try.  It's likely not perfect, but it
looks like it may be helpful in a lot of cases.

I'll have a look at your HDR. Looks, good, nice and clean.  How did you make it?
 Mirror ball or panoramic stitching?  It looks like you may not have quite the
dynamic range to capture the sun level as it flattens out at about 5 stops.
This is one of the most difficult things for creating HDR with direct sunlight,
and I have found very few that have the true full dynamic level of the sun.  One
thing I would suggest is to always take a photo at your fastest shutter speed as
part of the bracketing to capture as high as you can.  I will also try with my
dynamic range rebuilding option in my lighting which can recover or fake it
fairly well at times.  Do you have any other HDRs available?  I always liek to
find new ones that may have different interesting lighting effects.

-tgq

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