Improved Sun & Sky model playground!

[TomG]

Depends how the clouds were made - if an object with displacement and Inside Mode CoronaVolume, that can end up with overlapping faces and you may want to try the legacy medium resolving rather than the new (you'd have to disable it in the Devel/Experimental section). But, this may not apply if you used some other technique for the clouds - let us know.

[VASLAVO]

thanks, was that exactly, overlapping faces when displacement, will try what you suggest, iwill let you know

[Jens]

"Selection of the sun for the sky model computation has changed for scenes having multiple suns"

- how are we to understand this? I had hoped it would mean the sky would change and match the active sun in the lightmix, but I still get a static sky only matching the first sun. Only way to get correct sky with multiple suns seems to be if I manually turn off all other suns on each sun object in the scene (not via lightmix).
(This was in scene with prev. daily, but I have changed both sky model and ticked off the "legacy" texture in each sun object).

[Ondra]

we will consider implementing this as the next step, the first change was due to internal rewrite how sun vs. sky is handled

[Jens]

we will consider implementing this as the next step, the first change was due to internal rewrite how sun vs. sky is handled

ah okay, thanks for the reply Ondra. Would love to see this for ultimate flexibility - would I be wrong to assume that this could also lead to later implementation of getting correct results in i.e. the reflection pass etc when using lightmix w. multiple suns?

[jms.lwly]

Someone wanted to see some clouds.
(Edited because of errors with the upload...)

[TomG]

Ahh so many clouds I can't see the images! (somehow they aren't showing for me :( )

[vansan]

Tried OpenVDB clouds inside global volume with CoronaVolumeMtl.
VERY slow rendering speed with some sort of artifacts (CoronaVolumeMtl don't render behind OpenVDB cloud's gizmo).
Maybe I just don't know how to setup them? :/

Added test without Global volume material.

[Feodor]

The very best realistic sky happened!
No HDR, only new sky and volumetric clouds.

[Feodor]

Clouds

[romullus]

Looks nice. Are clouds VDB, or regular geometry? And what's that white line over the horizon?

[GeorgeK]

Clouds

Looks nice. Are clouds VDB, or regular geometry? And what's that white line over the horizon?

Love the clouds too welldone!

[cjwidd]

Did a series of tests for a simple scene using some permutations of the sun / sky model between v5 and v6. Images 1,2,3,4 are yoked to 5,6,7,8 for comparison.

Camera
FoV: 23.913 / Focal Length [mm]: 85.0
F-Stop: 16.0

Sun
Intensity: 1.0
Size: 64

Tonemapping


Hosek & Wilkie - sun (realistic) + sky (sat)


Hosek & Wilkie - sun (realistic) + sky (desat)


Hosek & Wilkie - sun (FFFFFF) + sky (sat)


Hosek & Wilkie - sun (FFFFFF) + sky (desat)



Improved - sun (realistic) + sky (sat)


Improved - sun (realistic) + sky (desat)


Improved - sun (FFFFFF) + sky (sat)


Improved - sun (FFFFFF) + sky (desat)

[Feodor]

Looks nice. Are clouds VDB, or regular geometry? And what's that white line over the horizon?

Yes I used VDB clouds, the sky is completely procedural
The line on the horizon is not yet clear to me artifact. Since the scene has a geometry that simulates the refraction of air probably because of her there is a line

[romullus]

[..] the scene has a geometry that simulates the refraction of air [..]

Interesting. Does that makes any difference appart from render time (presumably)?