Those of you who bought '1714 Clear Sky' should have received an automated email from www.pg-skies.net notifying you of an update to 1714. As I have mentioned in previous posts, I am going through a process of updating old skies that feature a strong sun to include a new alternative version.
When shooting HDR skies, it is very difficult to capture the full dynamic range of the sun as it is so incredibly bright. To combat this, in the past (following on from Bertrand Benoit's lead) I adopted a workflow that involves lowering the gamma of the HDR to make the bright parts of the sky brighter. This method has its drawbacks though, mostly in that it makes the colours in the sky a lot harsher, and sometimes makes the sky appear too bright in relation to the sun.
A few months ago I saw a post on the corona forum by dubcat who shared a nice method for adding a rendered sun (with the correct intensity) in to one of my HDR skies. To me it feels like a slightly more scientific method than simply painting in a brighter sun with Photoshop (also can work well), and I liked the results I was getting.
The new version included with 1714 is called 1714 Clear Sky_NewSun.hdr and to use you just need to remember to return the gamma value to 1.0 otherwise you'll get some very ugly results.