[pascaldechine]

hi everybody,

I played with the physical sky to see how does it work....and, let say I am little bit confuse.
I saw some pretty picture from maxwell users really amazing but I really don't understand how they can achieve such realism.

I am working on some outdoor furnitures and I would like to get this kind of results for the rendering:











And here is my result after several days trying to understand how does it work. It doesn't look real at all, specially for the materials of the bench. And this, I really don't understand.



I read again and again the maxwell manual...but at the moment, I did achieve a photorealistic outdoor rendering.

Anybody got an idea?

Pascal

[JDHill]

Hi Pascal,

I couldn't say for sure, but it looks like your scene is not scaled correctly, your camera exposure is set up wrong, or a combination of both. That could cause the materials to look bad, or it might be that the materials just are not made correctly. What are the camera settings you're using, and how big is the scene? Can you also describe your materials a bit?

Regarding your example pictures, you probably want to play with the Ozone parameter - higher values will make the sky more blue than lower ones. Post the settings you're using now and we can see what to change.

Cheers,

JD

[Cadhorn]

It would also do to bear in mind that the catalog shots you're referencing are undoubtedly photoshoped. That perfect blue sky is as much a product of someone's imagination and artistic skill as the furniture.

[pascaldechine]

Hi JD Hill and Cadhorn,

Thanks for your answer!

OK, I got time today so I run another test with a physical sky with the basic settings. This time, I checked all the settings, so here there are:

Film ISO: 125
Burn: 80
Monitor Gamma: 2.2
Units of the scene: milimeters
Levels: 9.74 (just a test)

And here some screenshots of the settings:

Camera settings:



Date settings:



Environnment settings:



Location settings:



And here the rendering result:




I know Cadhorn that most of the nice pictures we can see in magazines are photoshoped. Usually, I use to photoshoped mine also. But in order to have a very nice rendering even with post-prod, you need to have a good base (a good rendering). And here, I don't know how to achieve a good realistic outdoor rendering. Actually, this is my first time to use physical sky. I use to make all my rendering with a studio scene.

JDHill, for sure there is something wrong. I checked the scale, for this part, it's ok. It could be the camera exposure. I try different value, but didn't change a lot the result. I still have a rendering doesn't look photorealsitic. I don't know wich settings I have to change...That is the point!

I have other outdoor projects in my mind I would like to do, but I would like first understand how the physical sky works.

Concerning my materials, there are quite basic, some come from the maxwell librairy some made by me. But nothing special, just wood, plastic and tissu materials.

Thanks for your help

Pascal

[Mihai]

What is the white material like on the lounge chairs? It looks like it may be too white, everything gets blown out too quickly and you lose contrast.

[pascaldechine]

Hi Mihai

The white material is a basic satin material...nothing special. That is maybe not the perfect material...it is working pretty well in studio scene. And I don't really understand why, with a physical sky, it doesn't work anymore.

Maybe I have to adjust the settings of this materials, but it is not what it will make the global scene more realistic I think.

I have to play with the physical sky to have a realistic light I think.

Pascal

[pascaldechine]

Hi everybody,

Does anyone has a clue to help to achieve an outdoor rendering?

It will be really helpfull

pascal

[Fernando Tella]

I think your reference pictures are not only lit by sunlight. I guess they have set some extra lights to show those highlights. You could add an hdri for reflections and show us your materials so we can give some more advice.

[jespi]

Hi Pascal,

HAve you seen Mike's videos about materials?, if not i do recommend you take a look at that videos
http://think.maxwellrender.com/search.p ... otal=9&id=

[pascaldechine]

Hi Jespi,

Thanks for the link of the videos.
I checked but cannot download from China even with a proxy. But It doesn't seems to explain how the physical sky works.
My point here is really to understand how the settings of the physical sky work.

Fernando,

I already tried to render with an hdri. But the result wasn't satisfied. Maybe I could just use, as you said, the reflection of the hdri to get a nice light effect with nice shadow. I will try this way.
In another way, my hdri are maybe not really nice for my scene. I have some outdoor hdri with a nice blue sky. but when I render it, my scene is really to much blue...Pretty strange.

Anyway, I continue to work on it, to understand how to set a physical sky. Any advices are welcome.

Thanks everybody

Pascal