Corona Renderer Forum

General Category => I need help => Topic started by: Dippndots on 2016-10-19, 11:57:43

Title: Tweaking CoronaSky to simulate different times of day
Post by: Dippndots on 2016-10-19, 11:57:43
I was wondering if anyone had any tips or information on how to adjust the coronaSky parameters to better replicate different times of day/lighting conditions like dawn/dusk/night/etc. ?

I know you can change the colors, but I was looking for some more concrete/correct ways of doing it.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: Ondra on 2016-10-19, 12:31:54
it is really easy - use 3dsmax sun with "CoronaSun" type and set time of day there. Sky will adjust automatically.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: Ludvik Koutny on 2016-10-19, 12:37:32
I think he meant specifically cases of sun under the horizon. In this case, I am afraid, Corona sky doesn't support below the horizon sky model. Although, if you use 3ds Max 2017, Autodesk has implemented universal daylight system based on old CIE model, which supports night time. And it works with Corona.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: Dippndots on 2016-10-20, 11:21:33
Thanks Ondra, I had no idea the sky changed in conjunction with CoronaSun lol. But some below the horizon setups like Raw alludes to would be nice, we haven't moved to 2017 yet, so I guess I'll have to fake it by eye.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: Ondra on 2016-10-20, 11:52:13
we will do the below horizon thing when there is a paper on how to simulate it. I know there were tries to do it, but it is actually much more complex to properly simulate than above the horizon thing (because light has to bounce much more - night sky is "indirect lighting", day sky is "direct lighting"
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: Dippndots on 2016-10-20, 12:33:16
Cool, I'm surprised there isn't a paper, that's pretty much what I was looking for in an explanation.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: fraine7 on 2019-02-19, 16:39:28
Bringing this thread back to life to see if there have been any developments on the 'below horizon' issue with simulating time of day.

I'm currently working on a day to night transition sequence and the sky becomes orange in the evening but never gets any darker. It doesn't actually change much between the hours of 8pm and 4am.

Using Max's daylight system with Corona Sun and Skylight turned off

Cheers
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: maru on 2019-02-20, 13:13:27
No updates in this matter, and I am afraid no updates are planned at all at this time.
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: fraine7 on 2019-02-20, 13:55:29
No problem, thanks for the update!
Title: Re: Tweaking CoronaSky to simulate different times of day
Post by: maru on 2019-02-20, 17:08:26
Side note: we never say never :)