> Hello, in fact it's my first "real" scene. but i am not satisfied with it.
> I have a lot to correct :
>
> -realistic scales (real life sizes for objects)
It makes things esier to work with, but is not needed. Just keep a 
concistent scalling.
> -gamma
Should be set to 1

> -realistic railroad powerlines
> -better choice of textures for the cooling towers
> -perturbations in the road texture, and just a bit on the concrete of the
> buildings
> -focal blur (but since the field is wide i dont know if it is necessary
For that kind of view, minimal to no focal blur. All distances are very 
large relative to the aperture.
> -the fog is just here to block the view at the horizon. I will have to put big
> mountains at long range or maybe some skyscrapers
> -terrain unrealistic, will try geomorph or a macro to put boulders and rocks on
> top of the normal.
> -best practices for optimizations for quicker render (unions, etc...)
> More objects, like an oil refinery on the side (looks beautiful at night)
>
> I have the feeling that an open landscape is in some ways harder to get ok than
> little scale object with a limited field of view.
>
> -if anyone has some simple advices, i will be glad to read them !
> last thing :
> what i love with povray is that it stimulates a lot the brain spatial abilities
> to perform translations, rotations and some long forgotten math. :)
>
> image contains some macros of f-lohmueller (thanks) and skies from Mike Kost
> (thanks).  trees from Gilles Tran. (Thanks)
>
>

Why put your image in a ZIP file with zero compression, you should have 
posted the image by itself. Anyway, a PNG is already compressed and 
practicaly don't compress.

Street lamps on during the day?
Turn them off or keep them on and do a night scene.
If the lights are off, it will render faster at there will be less 
shadow tests.

Try to add some variety in the vegetation, or make it denser. Use some 
random rotations and some slight, possibly uneven, scalling to hide the 
similarities. rotate, uneven scale, rotate again.

The railway power line normaly also have another cable over the actual 
power cable connected by numerous vertical lines used to hold it 
straight. That superior cable do curve like a catenary.

Whenever several share the same texture, put them in an union and apply 
the texture to the union, not the objects.
If the objects have several textures, apply the dominant/most used one 
to the union.


Alain

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