My IRTC entry was pretty much a rush-job and I still want to make a good  
image of it.

I've made a couple of changes according to the comments on my entry.

Fortunately the render time has gone down from 12:30 hours to 1:30 hours  
after working more on the clouds :)

Unfortunately it doesn't seem possible to get a good-looking  
figure-of-eight ringed binary planet with realistic dimensions, so I've  
increased the distance between the planets 1.5 times. I still want to redo  
the crafts completely with more detail but I'm not very sure about the  
texture for a space-craft. Maybe black and white like a space-shuttle or  
else I'll keep the metal look and just dirty it up a bit... what do you  
think?

Can anybody please help me on the following, I can't seem to find any  
solution:

A)The transparencies on the rings aren't right - I used discs. If you look  
at the edge of the rings where it covers the planet's atmosphere, it  
doesn't fade even though the transmit value is 1. I've tried various  
combinations of filter and transmit as well, but nothing seems to fix it.  
I've also tried a higher max_trace_level but it still didn't help. How can  
I fix it?

B) The atmosphere looks right to me, but the planet's shadow seems too  
sudden, resulting in a sharp line where the shadow on the see starts and  
the atmosphere overlaps. Any ideas on how to fix it?

I'll post the code to povray.test.scene-files

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Attachments:
Download 'planetsb.jpg' (658 KB)

Preview of image 'planetsb.jpg'

> A)The transparencies on the rings aren't right - I used discs. If you
> look at the edge of the rings where it covers the planet's atmosphere, it
> doesn't fade even though the transmit value is 1. I've tried various
> combinations of filter and transmit as well, but nothing seems to fix it.
> I've also tried a higher max_trace_level but it still didn't help. How
> can I fix it?

   Perhaps the problem is the rgb part of the pigment? I found that I get
better fading when the totally-transparent map entry has the same rgb as the
preceding entry on the map.

> B) The atmosphere looks right to me, but the planet's shadow seems too
> sudden, resulting in a sharp line where the shadow on the see starts and
>  the atmosphere overlaps. Any ideas on how to fix it?

   That's the planet casting a shadow on the media? I don't know... but why
it doesn't happens with the other planet atmosphere?


-- 
Jaime Vives Piqueres

http://www.ignorancia.org

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On Wed, 27 Jan 2010 12:55:41 +0200, Jaime Vives Piqueres  

<jai### [at] ignoranciaorg> wrote:


>> A)The transparencies on the rings aren't right - I used discs. If you

>> look at the edge of the rings where it covers the planet's atmosphere
,  

>> it
>> doesn't fade even though the transmit value is 1. I've tried various
>> combinations of filter and transmit as well, but nothing seems to fix
  

>> it.
>> I've also tried a higher max_trace_level but it still didn't help. Ho
w
>> can I fix it?
>
>    Perhaps the problem is the rgb part of the pigment? I found that I 
get
> better fading when the totally-transparent map entry has the same rgb 
as  

> the
> preceding entry on the map.
>
I've tried that, but it didn't make a difference

>> B) The atmosphere looks right to me, but the planet's shadow seems to
o
>> sudden, resulting in a sharp line where the shadow on the see starts 
and
>>  the atmosphere overlaps. Any ideas on how to fix it?
>
>    That's the planet casting a shadow on the media? I don't know... bu
t  

> why
> it doesn't happens with the other planet atmosphere?
>

I see now the specular on the sea makes the line. If I remove the  

specular, it looks right.



-- 

-Nekar Xenos-
"The spoon is not real"

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"Nekar Xenos" <nek### [at] gmailcom> wrote:

> I see now the specular on the sea makes the line. If I remove the
>
> specular, it looks right.
>
>
>
> --
>
> -Nekar Xenos-
> "The spoon is not real"


I also recommend playing with the brilliance a bit - when I've done space
scenes, I've felt that a brilliance greater than one more closely matches
pictures of the earth from space.

As for the ring not being transparent at the end, the shape cuts off before the
color_map does.  This would not be the case if you were using the default wave
type, but since it is a cubic wave, the 0.220 portion of the color_map is not
reached before the end of the shape.  You can either move it further in or
change to another wave type.


-Reactor

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On Wed, 27 Jan 2010 23:04:38 +0200, Reactor <rea### [at] hotmailcom> wrote:

> "Nekar Xenos" <nek### [at] gmailcom> wrote:
>
>> I see now the specular on the sea makes the line. If I remove the
>>
>> specular, it looks right.
>>
>>
>>
>> --
>>
>> -Nekar Xenos-
>> "The spoon is not real"
>
>
> I also recommend playing with the brilliance a bit - when I've done space
> scenes, I've felt that a brilliance greater than one more closely matches
> pictures of the earth from space.
>
Brilliance doesn't affect the line, but yes I did have quite a high  
brilliance value. I've now brought it down to 1.5.

> As for the ring not being transparent at the end, the shape cuts off  
> before the
> color_map does.  This would not be the case if you were using the  
> default wave
> type, but since it is a cubic wave, the 0.220 portion of the color_map  
> is not
> reached before the end of the shape.  You can either move it further in  
> or
> change to another wave type.
>

I've tried different wave types and I still have the same problem,  
everywhere were there is transparency on the rings with the planet showing  
through, the cloud media is gone, as if the max-trace level is too low. I  
have max_trace_level 256.


-- 
-Nekar Xenos-
"The spoon is not real"

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> I've tried different wave types and I still have the same problem,
> everywhere were there is transparency on the rings with the planet
> showing through, the cloud media is gone, as if the max-trace level is
> too low. I have max_trace_level 256.
>
>

A disk is not just a surface. It is in fact the intersection of a plane 
and an infinite cylinder, showing only the cap. Anything under or behind 
it is considered inside. Media can't exist inside an object like a plane.

Add hollow to your disk and the media problem should go away.


Alain

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On Thu, 28 Jan 2010 22:47:48 +0200, Alain <aze### [at] qwertyorg> wrote:


>
>> I've tried different wave types and I still have the same problem,
>> everywhere were there is transparency on the rings with the planet
>> showing through, the cloud media is gone, as if the max-trace level i
s
>> too low. I have max_trace_level 256.
>>
>>
>
> A disk is not just a surface. It is in fact the intersection of a plan
e  

> and an infinite cylinder, showing only the cap. Anything under or behi
nd  

> it is considered inside. Media can't exist inside an object like a pla
ne.
>
> Add hollow to your disk and the media problem should go away.
>
>
It is hollow with double_illuminate as well. This is done in beta 35b.  

Maybe I should check if there's a difference when rendered with Ver 3.6

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You allow a criticism, I hope constructively.

Technically the picture is outstanding, this done entirely with POV? As an IRTC
I suppose, a great job.

However, the criticism is in design: the image is too heavy, has too many
things.

The images of deep space have to give the impression that we are looking at
infinity, we look to the void, this picture gives the contrary impression, we
are in the midst of a crowded city. At least in my view should not be.

I could remove the second planet ring (red), he excess, and the ship in the
left, the image stays the same technique and outstanding, but less saturated
with things.

Another possible solution would be to use an image size larger to get the same
items, with this you get a spacious feeling without losing the things that you
created, or reduce slightly the size of the elements.

As for realism, is not possible, by the gravitational forces involved, have a
multiple system of planets like the ring samples, the rings are formed by
gravitational stability (they are like dust settled) in a system with several
massive bodies, these rings would end shredded sooner or later.

I hope these words do not detract your great work, a greeting.

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The clouds on the earth-like planet look nice. The rings feel
out of place on terrestial-mass planets, and they most certainly
can't be stable in such a close binary system. Also, the four
astronomical bodies seem a bit artificially lined up, as do
the perfectly parallel tilts of the two planets.

BTW the rings look like they're perfectly edge-on to the
sun (spring/autumn equinox) and probably wouldn't cast any
shadow at all (the average thickness of Saturns rings is
only on the order of tens of meters on average).

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On Thu, 28 Jan 2010 22:47:48 +0200, Alain <aze### [at] qwertyorg> wrote:


>
>> I've tried different wave types and I still have the same problem,
>> everywhere were there is transparency on the rings with the planet
>> showing through, the cloud media is gone, as if the max-trace level i
s
>> too low. I have max_trace_level 256.
>>
>>
>
> A disk is not just a surface. It is in fact the intersection of a plan
e  

> and an infinite cylinder, showing only the cap. Anything under or behi
nd  

> it is considered inside. Media can't exist inside an object like a pla
ne.
>
> Add hollow to your disk and the media problem should go away.
>
>
> Alain

I've finally fixed it by adding hollow to the isosurface surface of the 
 

vulcanic planet. I'm not sure why it works, but it does. I think it migh
t  

be a bug because the problem does not appear when using ver 3.62, only o
n  

3.7 beta.

Another thing: Should I put the materializing enemy craft in again or do
es  

it look better without it?

-- 

-Nekar Xenos-
"The spoon is not real"

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