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Print at Dec 19, 2025, 12:41:25 AM
Posted by Ceciliabr at Oct 30, 2016, 4:05:27 PM
Autumn colours


A new morning.




Every morning, Lillith runs to the mirror, to see if her reflection is still there.



She likes the autumn. She likes the colours – but she doesen't really like mornings.



She spends her days waiting – often in front of the window.



Watching the leaves fall, and the rain. The puddles become like mirrors.



Water makes the colours brighter when the sun comes back.
-Watch out, cat! There are eagles here!




Soon it will be dark. Autumn is good.




The best thing about autumn is that the days get shorter, so the nights get longer.




It's time to turn the mirror … her dad will get up soon.





Cec

Posted by bdfd at Oct 30, 2016, 5:24:02 PM
Re: Autumn colours
As usual, big realism in the rendering ! applause
----------------------------------------
Evil progresses when good people do nothing!
---
SH3D 7.1 and nothing else - W11 64b in 4K

Posted by VeroniQ at Oct 30, 2016, 5:33:33 PM
Re: Autumn colours
And very inspired and on purpose for halloween! I love it!

Posted by Miker777 at Oct 30, 2016, 8:49:39 PM
Re: Autumn colours
Great renders Cec, love those trees

Posted by Ceciliabr at Oct 31, 2016, 12:38:44 PM
Re: Autumn colours
Thanks for the nice comments.

Let me explain the reason for this thread:
When someone says something can't be done, I normally try to find out for my self if that's true,
but when I learned that Enhance external brightness had no effect when textured skies were used, I never even bothered to check if that really was the case.


Sunshine is nice, but cloudy days and hazy evenings are not so bad either, at least not when it comes to photographing or making illustrations.
In order to make nice renderings of evening shots or shots of cloudy days without any directional shadows, I have until now lighted my scenes with a grid of white lights at 100% ,
placed some 15-20 meters above the surface, and I have used my standard settings which I have found to work best,
like this:




****


I have been nursing a two-year-old with an autumn-cold for a couple of days, and have distracted her from the discomfort of her cold
by having her sit with me while I have been playing with SH3D. At the same time I have told her about why the leaves are getting yellow and fall to the ground – and we have talked about vampires (!)

And very inspired and on purpose for halloween!

Exactly smile

And then I made a discovery.

Using my standard settings, I made a test rendering to decide if the lighting was sufficient.
I got a result that was too dark.




I have no idea what made me tick the Enhance external brightness button.
To my astonishment, the image rendered like this:



As it turns out, enhancing the external brightness works perfectly with textured skies,
in fact it works better than with non-textured skies.

Rendered @ midnight with a non-textured sky, using the same settings:



Same settings, sky textured with a red gradient:









Now, this is interesting.
It seems to me that the enhancement is based upon the reflections coming from the sky,
and that the shadows are created based on the time of day.

For me, this is a very useful and uplifting discovery.

What would be nice, though, is to have some more control over the brightness
– a slider maybe, or some pre-programmed steps with different intensities.


Cec

Posted by bdfd at Oct 31, 2016, 1:03:54 PM
Re: Autumn colours
Good analysis for all.

Few months ago, I tryed these kinds of tests but with one light only.
Put more is a good idea.

The proof, is the well done third picture.

Brrrr, the red sky announces the coming of Dracula... devilish
----------------------------------------
Evil progresses when good people do nothing!
---
SH3D 7.1 and nothing else - W11 64b in 4K

Posted by MartinSK at Oct 31, 2016, 10:48:27 PM
Re: Autumn colours
There's nothing to say....Just love it.. Love love love... And I can watch that pictures again and again... Still love...
Martin

Posted by enkonyito at Nov 4, 2016, 12:59:50 AM
Re: Autumn colours
@Ceciliabr
As it turns out, enhancing the external brightness works perfectly with textured skies, in fact it works better than with non-textured skies.
For a sky with texture, the effect of the Enhance external brightness option depends on the used image.

Here are some images showing different versions of the photo plug-in.
Version 1.2 has an option to enhance the external brightness for a sky without texture.

Option disabled (default)

Option enabled
Santbose,

As said Mazoola, Sunflow uses different types of light for a sky without texture (SunSkyLight) and a sky with texture (ImageBasedLight).
Although they have a parameter that seems common, rendering for a sky with texture depends on the image used (example: blue sky or cloudy sky).

Option disabled

Option enabled

----------------------------------------
EnkoNyito

Posted by Ceciliabr at Nov 4, 2016, 11:53:25 AM
Re: Autumn colours
@MartinSK

Thank you smile

Posted by Ceciliabr at Nov 4, 2016, 12:36:18 PM
Re: Autumn colours
@enkonyito

Aha! Image based lighting, of course. That explains a lot.

Here are two images, one with clouds and one with a completely white sky.
Both images rendered at midnight with enhanced brightness.




IBL-comparison in daylight (09PM)



This means that the colour and the intensity of the sky can be used to manipulate
both the tint and the exposure.
Good to know.

cec

Posted by enkonyito at Nov 4, 2016, 4:01:08 PM
Re: Autumn colours
I love the shine and reflections of your floor.

Regarding your query,
What would be nice, though, is to have some more control over the brightness
– a slider maybe, or some pre-programmed steps with different intensities.
I would not complicate the photo panel for current users but I could study its feasibility for tests.

Here is how is managed the lighting of the sky and the sun for the SH3D standard photo panel.
if (!this.useSunSky) {
// If observer camera is used with a sky texture,
// create an image base light from sky texture
...
this.sunflow.parameter("samples", 0);
this.sunflow.light(UUID.randomUUID().toString(), "ibl");
}
...
if (this.useSunSky) {
...
this.sunflow.parameter("samples", this.useSunskyLight ? 12 : 0);
this.sunSkyLightName = UUID.randomUUID().toString();
this.sunflow.light(this.sunSkyLightName, "sunsky");
}
...
// Simulate additional Sun with a faraway sphere light of a color depending of the hour of the day
int sunPower = this.useSunskyLight ? 10 : 40;
...
this.sunflow.parameter("samples", 4);
this.sunLightName = UUID.randomUUID().toString();
this.sunflow.light(this.sunLightName, "sphere");

Here are those of the new plug-in in development (bringing together the old plug-ins related to rendering).
if (!this.useSunSky) {
// If observer camera is used with a sky texture,
// create an image base light from sky texture
...
this.sunflow.parameter("samples", AdvancedPhotoPanel.isEnhancedExternalBrightness() ? 12 : 0); // modification (enkonyito)
this.sunflow.light(UUID.randomUUID().toString(), "ibl");
}
...
if (this.useSunSky) {
...
this.sunflow.parameter("samples", AdvancedPhotoPanel.isEnhancedExternalBrightness() ? 12 : 0); // modification (enkonyito)
this.sunSkyLightName = UUID.randomUUID().toString();
this.sunflow.light(this.sunSkyLightName, "sunsky");
}
...
// Simulate additional Sun with a faraway sphere light of a color depending of the hour of the day
int sunPower = !this.useSunSky ? 40 // sky with texture and virtual visit
: // sky without texture or aerial view
AdvancedPhotoPanel.isEnhancedExternalBrightness() ?
20 : 40; // modification (enkonyito)
...
this.sunflow.parameter("samples", 4);
this.sunLightName = UUID.randomUUID().toString();
this.sunflow.light(this.sunLightName, "sphere");

----------------------------------------
EnkoNyito

Posted by bdfd at Nov 4, 2016, 5:07:41 PM
Re: Autumn colours
Pictures : Yes, source NO !

It's not the place... devilish
----------------------------------------
Evil progresses when good people do nothing!
---
SH3D 7.1 and nothing else - W11 64b in 4K

Posted by Ceciliabr at Nov 4, 2016, 8:48:50 PM
Re: Autumn colours
@enkonyito

I love the shine and reflections of your floor.


Mmm ... yes, the floor. Memories of my childhood, indelibly fixed as images in my mind. The floor in the grand parlour was waxed and polished every Friday - and on the very few occasions I was allowed to enter, it felt like walking on a shiny glass panel. I walked carefully, wearing woolen socks, and stared in awe at the shining, bluish reflections - the whole room was reflected in the floor – maybe the whole world. If I bent down and looked closely, I could see layers of patterns that wound their way deep down into the wooden floor, like there was a three-dimensional image lying under the shiny glass surface, adding a new texture to the reflection of my face.
But the grand parlour was not a place for children – except for Christmas.

That's where the idea comes from - the idea of adding a layer of shiny glass on top of the floor.
A glass transparent layer, 0.2 cm, placed on its own level so it easily can be turned on and off – and I'm back in my childhood residence - back in the forbidden parlour.

Sometimes I wish I had learned to code instead of learning the piano.

Coding is art.

Thanks for sharing. Your plugin is highly valued.

Cec.

Posted by okh at Nov 6, 2016, 9:48:06 AM
Re: Autumn colours
Thanks for this thread Cec - and for the elaboration enkonyito. Your technical take is interesting and pertinent to the purpose of this thread. Even with little to contribute, the thread makes for interesting reading and great reference. Even for the less gifted. And, of course, the images are outstanding. ok


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Dec 19, 2025, 12:41:25 AM