Just the output from indigo's sky: the sun in that position gives that effect thanks to the exr format: tuning the gamma and the...mmm...the other parameter, i'm quite stoned atm sorry, i was close to what you see. I simply tuned a bit more in photoshop by layering 2 different images (different brightness /contrast basically) and played with different layer types. Then i added a lens flair (with a very low setting otherwise you get all those streaks whcih i don't care about). So i guess it's 70% indigo, 15% OpenEXR format, 15% photoshop...or something like that. Uh, one more thing: i switched from D75 to E as suggested somewhere, but on this outside scene i didn't see a great difference (should make further tests though).
More renders in the days to come, when i got some more free time to play with indigo (which is becoming my favourite render mainly because..it's so easy getting nice stuff

, soon it will get in my daily workflow hopefully).