Hi(gh)!

On 13.01.2012 16:29, Hildur K. wrote:


> inside you have to use two different radiosity settings for each situation.

...and as I aim at building consistent worlds which I would like to 
animate, this is a show-stopper! How can I move the camera from inside 
to outside (e. g. through an open door) without getting those weird 
brightness oscillations like with cheap digital cameras in video mode?

> One tip: try to avoid using colors for surfaces that are 100% white (or 100%
> black for that matter) they can never be realistic.
>
> One more thing. The recursion limit of 5 is probably a bit too high for your
> scene as you are getting more light in through the windows than in the tutorial.
> "recursion limit" controls how many times indirect light bounces off the
> surfaces. Where there is little light coming in you typically use higher values
> to get more light in you room. Every situation is unique so you may have to try
> out a few variations. Too much recursion washes away the contrast, too little
> and your scene is too dark. Only do this AFTER you set the material finishes to

>
> Try playing with the balance between "recursion limit" and "brightness".
>
> I usually use recursion limit of 3-5 indoors and 1-3 outdoors.
>
> If you start getting "dirt" or dark smudges on your surfaces, that means you are
> on the right track. Those you should be able to get rid of in the final
> rendering by raising "count" to 400-600. It takes longer to render but that is
> the necessary evil of radiosity.

Thank you for your advice... but meanwhile, Thomas de Groot has provided 
me with some settings which work well both inside and outside... and 
render FAST, the "kitchen" scene takes only about 4 minutes on my Athlon 
64 3500+!

When it comes to animation: is there any way to avoid that strange 
"flickering" of radiosity between the frames?

See you in Khyberspace!

Yadgar

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> ...and as I aim at building consistent worlds which I would like to
> animate, this is a show-stopper! How can I move the camera from inside
> to outside (e. g. through an open door) without getting those weird
> brightness oscillations like with cheap digital cameras in video mode?

And just like our eyes too. Sometimes PovRay shows that our imagination 
is better than real life.

I am pleased that Thomas has come up with a compromise solution.

-- 
Regards
     Stephen

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> Hi(gh)!
>
> On 13.01.2012 16:29, Hildur K. wrote:
>

>> outside and
>> inside you have to use two different radiosity settings for each
>> situation.
>
> ...and as I aim at building consistent worlds which I would like to
> animate, this is a show-stopper! How can I move the camera from inside
> to outside (e. g. through an open door) without getting those weird
> brightness oscillations like with cheap digital cameras in video mode?

Not only cheap cameras you know. Watch any TV documentary and you will 
see brightness adjustments being made while the camera moves from inside 
to out or vice versa. In movies I suspect they avoid this by shooting 
scenes either inside or outside and making the view through the window 
artificial by using a backdrop for instance which they can tune to the 
scene. By the way, there is a method to achieve this brought to us by 
Tim Nikias back in 2005: www.nolights.de using his glare.inc macro for 
creating a backdrop image. His example is the Waiting for Company scene.
>
>
> Thank you for your advice... but meanwhile, Thomas de Groot has provided
> me with some settings which work well both inside and outside... and
> render FAST, the "kitchen" scene takes only about 4 minutes on my Athlon
> 64 3500+!
...And I learned a lot about radiosity in version 3.6 from Hildur! :-)
Good to see you here again once in a while, Hildur!

Thomas

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=?ISO-8859-1?Q?J=F6rg_=27Yadgar=27_Bleimann?= <yaz### [at] gmxde> wrote:
> When it comes to animation: is there any way to avoid that strange
> "flickering" of radiosity between the frames?

The +HR command line switch in 3.7 may help with this.  I haven't tried it
myself, so you'll have to experiment.

You are, of course, using -J for anti-aliasing.  (That actually hasn't worked
for me in 3.7, but Christoph hasn't reproduced the problem.)

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