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)
-gamma
-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
-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)

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Attachments:
Download 'rail0232.zip' (1494 KB)

> 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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Am 28.01.2012 05:10, schrieb Alain:

>> 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

To prevent confusion:
- assumed_gamma scene setting should be set to 1.
- Display_Gamma ini file setting should match your display's gamma (2.2 
is a good solid guess; if using POV-Ray 3.7, you should be fine without 
explicitly specifying this setting).
- File_Gamma ini file setting should be left alone (in POV-Ray 3.6 it 
doesn't exist, while in POV-Ray 3.7 the default is usually the best choice).

I actually do like the colors. While they're unrealistic (and even 
though in my renders I usually strive for photorealism), it gives the 
image some surrealistic touch.

>> -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.

Rule of thumb: If using focal blur, set aperture size to whatever 
POV-Ray units would match a size of somewhere around 1 cm (somewhere 
between the size of a human's pupil and the apparent size of a camera's 
aperture as seen through the lens). Significantly higher values will 
make your scene look like a miniature.

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clipka <ano### [at] anonymousorg> wrote:
> Am 28.01.2012 05:10, schrieb Alain:

> >> 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
>
> To prevent confusion:
> - assumed_gamma scene setting should be set to 1.
> - Display_Gamma ini file setting should match your display's gamma (2.2
> is a good solid guess; if using POV-Ray 3.7, you should be fine without
> explicitly specifying this setting).
> - File_Gamma ini file setting should be left alone (in POV-Ray 3.6 it
> doesn't exist, while in POV-Ray 3.7 the default is usually the best choice).
>
> I actually do like the colors. While they're unrealistic (and even
> though in my renders I usually strive for photorealism), it gives the
> image some surrealistic touch.
>
> >> -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.
>
> Rule of thumb: If using focal blur, set aperture size to whatever
> POV-Ray units would match a size of somewhere around 1 cm (somewhere
> between the size of a human's pupil and the apparent size of a camera's
> aperture as seen through the lens). Significantly higher values will
> make your scene look like a miniature.

thanks for all the info.
i will update the catenary for the railroad power lines, with two parallel
cables.
In fact, i noticed that railroad power lines have no slack so there is no need
to use a catenary function and a sphere sweep. a simple cylinder will do

i felt inspired however to play with catenaries so
I added a real high voltage power line and a catenary with slack. the result is
good.

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