[Becco_UK]

It's all too easy too choose a render to prove a particular point. So I set up a quick test to see what happens to the pink effect as the day progresses.

The goegraphical location is the United Kingom. The date set 5th May, 2005

The scene was assembled and exported from Cinema4D 9.6 as an mxs and that was in turn opened in Maxwell Studio 1.5. The ground plane is set at 0 ( Cinema4D y axis). The camera is placed at 1.8 Metres above the plane facing exactly into the Cinema4D z axis.

The goegraphical location is the United Kingom.

In Maxwell Studio four images of 3 hour intervals were rendered to sample level 12.

By using a colour picker, the 09.00, 12.00 and 15.00 images disclose very little difference when testing the rgb values of the pink area.

The noticable change comes in the 18.00 image.

Draw your own conclusions. Mine is that the Maxwell sky is far from what could be described as physically accurate but as I posted earlier I personally prefer the unreal pink effect.

[Maxer]

I think it's clear that the sky isn't working as it should; the question is when will it be fixed? Because of the pink in the sky all my renderings are going to have that color in them as well which I've already been told by the designers and architects I work for that it's unacceptable. I've tried to get a totally blue sky with no pink but have been unable to so far. Tyrone or Juan can you provide a tutorial that we can use to produce blue sky's to hold us off until you update the sky model?

[NicoR44]

Hi Maxer,

I think you missed Juan's post :

Hi Hybaj,

Now this is going to be a very interesting debate and I knew that the dev team and testers are going to defend the current model at all costs.

It was not my intention. Actually I just pointed out a limitation of the current model regarding altitude that we'd like to improve soon. There were issues in v1.1 sky in both color and intensity and we have further enhanced that area. If now that this items have been fixed we notice that new parameters are needed we will work on that. Thanks again for the interesting discussion here.

Regards,

Juan

[Maxer]

No I didn't miss it, he never said when they were going to fix it and I can't wait weeks for Maxwell to be fixed, I need it to work properley now.

[superbad]

How can this be an altitude adjustment issue? Take a picture standing at the surface of the ocean, at sea level (altitude 0), in the middle of the day, away from a smoggy metropolitan area (I'm looking at you SF), and the sky is not pink at the horizon.

Also, why won't Studio let me adjust turbidity below 1.8? Is that a bug or a feature?

[Tyrone Marshall]

I think it's clear that the sky isn't working as it should; the question is when will it be fixed? Because of the pink in the sky all my renderings are going to have that color in them as well which I've already been told by the designers and architects I work for that it's unacceptable. I've tried to get a totally blue sky with no pink but have been unable to so far. Tyrone or Juan can you provide a tutorial that we can use to produce blue sky's to hold us off until you update the sky model?

Maxer go ahead and send me your scene. I'll return it to you later in the week.

[Hybaj]

If I understand this then the altitude adjustment will probably only shift the gradient a bit down and that will eventually result in darker skies. And that's not good if you ask me

[hdesbois]

Also there is quite an integer bug since the sun position does not reflect the actual real position and movement of the sun in real world. It's pretty off

I performed some tests regarding the sun position, and I found it quite accurate. The test method is using a sundial corrected for the legal (winter) time and drawn for a specific place. I'm using a free version of Shadow software: http://perso.orange.fr/blateyron/sundia ... index.html . It allows to draw lines for the shadow length at soltices or arbitrary dates.
Here is an example:

Blue line is for december solstice. Place is a public garden in southern Paris.
As you can see, it's pretty accurate.

HD.

[Tyrone Marshall]

Also there is quite an integer bug since the sun position does not reflect the actual real position and movement of the sun in real world. It's pretty off

I performed some tests regarding the sun position, and I found it quite accurate. The test method is using a sundial corrected for the legal (winter) time and drawn for a specific place. I'm using a free version of Shadow software: http://perso.orange.fr/blateyron/sundia ... index.html . It allows to draw lines for the shadow length at soltices or arbitrary dates.
Here is an example:

Blue line is for december solstice. Place is a public garden in southern Paris.
As you can see, it's pretty accurate.

HD.

Thank you Hdesbois for providing this level of research and practical evaulation.

[Maxer]

I don't think anyone is saying the scientific model governing the sun and sky is incorrect, we're simply saying for what ever reason it looks wrong.

[ivox3]

For you Devin ......

http://www.youtube.com/watch?v=heS_Ww1Z ... ed&search=

[Frances]

For you Devin ......

http://www.youtube.com/watch?v=heS_Ww1Z ... ed&search=

[lllab]

ok my 2 cent.
i also think the sky needs a bit more tuning, but i must say i like the 1.5 sky better than the previous ones...

it goes in the right directions. the pink in morning and evening is correct i think, at least where i am the sky looks like this, but the pink stayesa bit long in the day time. it should vanish in mid day more.

also the night is still missing to be right and a fluent transition from night to day.i hope that will come also to mw in a "sky update".

but as aid i find 1.5 sky nicer than the yellow 1.1 and 1.0 sky.

cheers
stefan

[fv]

I never liked the pink horizon's in 1.1 or before and simply moved my models a few kilometers up in the sky and so I had a nice gradient in blue as I usually get when doing architectural photography. The pink maybe correct but its an undesirable effect in renderings. At least it is for my clients. Using Maxwell means you have extra work to do after the render is done. Either in Photoshop or by moving the model up away from the horizon or use an alpha layer to clip the environment all together.

My comment to NL is, although maybe not 100% realistic, make it an adjustable feature to set the horizon color by the user. [/i]

[numerobis]

I never liked the pink horizon's in 1.1 or before and simply moved my models a few kilometers up in the sky and so I had a nice gradient in blue as I usually get when doing architectural photography. The pink maybe correct but its an undesirable effect in renderings. At least it is for my clients. Using Maxwell means you have extra work to do after the render is done. Either in Photoshop or by moving the model up away from the horizon or use an alpha layer to clip the environment all together.

My comment to NL is, although maybe not 100% realistic, make it an adjustable feature to set the horizon color by the user. [/i]

yes, this is true...
in most cases when the sky is seen - especially the horizon - i don't work with the phys sky but take a hdr background or pshop it after the render. it would be really good the sky model could be improved in a way that it looks physical correct...
also i can't belief that it is really the physical correct model, cause it looks definitively not real in most cases.