How to get my corona sky this type of blue

[Frood]

I can´t speak in angles because the first customer question after "when", "how much",  and "do I get 300dpi" is usually "Is the sun lighting correct?". So our default maxstart scene comes with a daylight system and I never cared about it. But -3,5 covers a wide range, obviously you have a low highlight compression value. I use -3,3,3 (EV/HC/Contrast) to start.

Good Luck

[PROH]

Well I agree with romullus. In a summer outdoor scene my EV will typically be around -4,2 with he and contrast both set to 1. And with these settings the sky doesn't look a bit overexposed.

[Frood]

Had to test Corona 1.4 vs. 1.5.2 for another reason and did a simple check with a sun+sky system.

Render settings reset - then EX -3.5, HC3, C3. See the result. This is what I was refering to here:

https://forum.corona-renderer.com/index.php/topic,13785.msg89685.html#msg89685


Good Luck

[romullus]

Is it sky or HC / Contrast that has changed? Did you try to do same comparison with HC1, C1?

[Frood]

I´t the contrast setting which acts differently (forgot to check further before installing 1.5.2 on Max2014, reversed to 1.4 again now again). So it´s not noticable when using C1.


Good Luck

[maru]

Expected differences between 1.4 and 1.5:
https://coronarenderer.freshdesk.com/support/solutions/articles/12000019367-what-might-change-if-i-open-an-older-scene-in-corona-1-5-

[dj_buckley]

Well I agree with romullus. In a summer outdoor scene my EV will typically be around -4,2 with he and contrast both set to 1. And with these settings the sky doesn't look a bit overexposed.

Sorry to dig up a 2 and a half year old thread, but this is something I'm currently looking at at the minute.  Now that PBR materials/textures are much more commonplace than they were back in 2016 when this thread was alive.  I'm curious as to whether you're still finding -4.2 as a good EV value for exterior summer shots in bright sunlight?

[PROH]

:) TBO these days I mostly use HDRI's. And when I use the Corona sun & sky, I often use it with a LUT, why the exposure value is set accordingly.

So I can't really say if values around -4,2 still is the sweet spot, but I haven't noticed any dramatically changes neither.

Hope it helps

[dj_buckley]

I just find, -4 way too dark too like Frood, hence why I asked.  I seem to be -3.5, -3 at the minute too, was just curious that's all.  The reason I mentioned PBR becoming more commonplace is that PBR effectively introduced the notion that the Albedo (Diffuse) is actually much darker than what we first perceived or should I say used. 

So for example white painted stucco walls albedo being around 170,170,170 - on a sunny day, i'd expect a white stucco wall to look quite blown out, but if you set that up in Corona with a sun/sky both being on 1, at EV -4.2 it looks super dull and grey, yet changing it to -3.25, with a touch of HC (say 1.5), it starts to look as I'd expect it look in reality with areas of direct sunlight looking nice and white.

So I was just querying and curious as to whether the suggested -4ish EV originally stemmed from materials being too bright as opposed to incorrect sun exposure