Greetings!

Here is a small sample video of the huge SENECA, an imperial carrier ship.
While the SENECA is, meanwhile, in a much more advanced development stage,
the video clip shows her in her earlier but still very impressive days.

AVI (MS MPEG4 v2 video codec and Microsoft ADPCM sound codec), ca. 2.98 MB
--> http://www.Jamaica-Focus.com/m/SENECA.avi

More pics of the SENECA are of course inside the "povray.binaries.images"
newsgroup, with similar names like this thread.

Enjoy!

Sven

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Attachments:
Download 'SpaceCarrierSmall.jpg' (199 KB)

Preview of image 'SpaceCarrierSmall.jpg'

The sparkling really takes a lot away from it, though I know that's 
really just a lack of resolution due to a desire to keep file size low.

But otherwise, pretty nice!

-DJ

Sven Littkowski wrote:
> Greetings!
> 
> Here is a small sample video of the huge SENECA, an imperial carrier ship.
> While the SENECA is, meanwhile, in a much more advanced development stage,
> the video clip shows her in her earlier but still very impressive days.
> 
> AVI (MS MPEG4 v2 video codec and Microsoft ADPCM sound codec), ca. 2.98 MB
> --> http://www.Jamaica-Focus.com/m/SENECA.avi
> 
> More pics of the SENECA are of course inside the "povray.binaries.images"
> newsgroup, with similar names like this thread.
> 
> Enjoy!
> 
> Sven
> 
> 
> 
> 
>

Post a reply to this message

Wow impressive! I agree with DJ Wiza that the low resolution really 
hurts this but it's still very nice. The music and engine sounds really 
help it along too!

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Hi DJ,

thanks for your comment! Actually, if you describe the flickering lights on 
the ship with "sparkling", it seems to be an error of POV-Ray (the version 
3.6). The full-size video has the same flickering lights (of course), 
unfortunately. I am not happy about it.

Have you seen the image collections of the ship?

Greetings,

Sven





"DJ Wiza" <Kil### [at] sohcahtoanet> schrieb im Newsbeitrag 
news:4471071b$1@news.povray.org...
> The sparkling really takes a lot away from it, though I know that's really 
> just a lack of resolution due to a desire to keep file size low.
>
> But otherwise, pretty nice!
>
> -DJ
>
> Sven Littkowski wrote:
>> Greetings!
>>
>> Here is a small sample video of the huge SENECA, an imperial carrier 
>> ship.
>> While the SENECA is, meanwhile, in a much more advanced development 
>> stage,
>> the video clip shows her in her earlier but still very impressive days.
>>
>> AVI (MS MPEG4 v2 video codec and Microsoft ADPCM sound codec), ca. 2.98 
>> MB
>> --> http://www.Jamaica-Focus.com/m/SENECA.avi
>>
>> More pics of the SENECA are of course inside the "povray.binaries.images"
>> newsgroup, with similar names like this thread.
>>
>> Enjoy!
>>
>> Sven
>>
>>
>>
>>

Post a reply to this message

"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote:

> thanks for your comment! Actually, if you describe the flickering lights on
> the ship with "sparkling", it seems to be an error of POV-Ray (the version
> 3.6). The full-size video has the same flickering lights (of course),
> unfortunately. I am not happy about it.

It looks like there are large scale (~up to a hundred pixels across)
frame-to-frame brightness variations, as well as smaller-scale stuff. You
didn't render this with radiosity on, did you?

Tom

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"Tom York" <alp### [at] zubenelgenubi34spcom> wrote in message 
news:web.44711a90c90de8f47d55e4a40@news.povray.org...

> It looks like there are large scale (~up to a hundred pixels across)
> frame-to-frame brightness variations, as well as smaller-scale stuff. You
> didn't render this with radiosity on, did you?


Do the individual frames differ so drastically?  It looks like video 
compression issues, IMHO.  Also, did you perhaps forget to turn of jitter?

- How

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"How Camp" <hac### [at] gmailcom> wrote:

> Do the individual frames differ so drastically?  It looks like video
> compression issues, IMHO.

I agree that there are very strong video compression artefacts visible, but
I don't think they're all that's going on. The regions of elevated
brightness follow the hull, not the compression blocks, and they're very
soft features. If they're the result of radiosity associated with Sven's
window texture (which I think I read elsewhere had a high ambient value),
then these regions would naturally flicker because the radiosity sampling
would change from frame to frame (and those are very small features anyway,
so they'd require very good sampling indeed).

The background's brightness (not its distortion) flickers slightly but not
over lots of nearby compression blocks that I saw, which again suggests to
me a lighting issue, not a compression one.

On the other hand, I've never used or seen this particular codec before, so
I could easily be completely mistaken.

Tom

Post a reply to this message

Greetings alltogedda!

This small video is a recompiled copy of a larger 800x600 video. That, too, 
has these bad flickering effects. It is not a result of any video codec.

I rendered the animation with radiosity turned on, and jittering 
consequently turned off. And yes, Tom is right, the ship has 3 layers, the 
first layer featuring an ambient-5.0-pigment-White texture.

Tom, you say that this could be the reason for the flickering, right? What 
can I do to get rid of the flickering? Setting the ambient down to 1.0? and 
what else? Any way to change the sampling, and would that help?

PS: for those who want to get larger versions: there is a fast playing 
(lesser seconds) version of 45 MB, and the real freaky full-size original 
monster video of 124 MB. But if you want to get it, you need to tell me how! 
;-)

Greetings,

Sven



"Tom York" <alp### [at] zubenelgenubi34spcom> schrieb im Newsbeitrag 
news:web.4471f3e2c90de8f47d55e4a40@news.povray.org...
> "How Camp" <hac### [at] gmailcom> wrote:
>
>> Do the individual frames differ so drastically?  It looks like video
>> compression issues, IMHO.
>
> I agree that there are very strong video compression artefacts visible, 
> but
> I don't think they're all that's going on. The regions of elevated
> brightness follow the hull, not the compression blocks, and they're very
> soft features. If they're the result of radiosity associated with Sven's
> window texture (which I think I read elsewhere had a high ambient value),
> then these regions would naturally flicker because the radiosity sampling
> would change from frame to frame (and those are very small features 
> anyway,
> so they'd require very good sampling indeed).
>
> The background's brightness (not its distortion) flickers slightly but not
> over lots of nearby compression blocks that I saw, which again suggests to
> me a lighting issue, not a compression one.
>
> On the other hand, I've never used or seen this particular codec before, 
> so
> I could easily be completely mistaken.
>
> Tom
>
>
>

Post a reply to this message

"Sven Littkowski" <sve### [at] jamaica-focuscom> wrote:

> Tom, you say that this could be the reason for the flickering, right? What
> can I do to get rid of the flickering? Setting the ambient down to 1.0? and
> what else? Any way to change the sampling, and would that help?

Turn off radiosity. It doesn't usually do anything for space renders that
you can't do with ordinary lights. Keep the textures as is, mimic the
window lighting effect of radiosity using spotlights with fade_power and
fade_distance set, or if you want it easier, use post-production effects to
achieve the lighting bloom (for which you'd probably want an external 2D
paint application).

The reasons for the flicker, I'm guessing, are to do with the way that
radiosity works (see the manual, 3.3.4 for a few more details on it). Your
scene is a problem for radiosity, because you've got rapid changes in
ambient light over a small area (your windows) - this damages one of the
approximations that radiosity works under. When a radiosity patch is
sampled, a large number of rays are sent out from it to estimate the
indirect illumination falling on it (as described in the docs). Half the
problem is probably that your windows are so small that they are likely
missed by many samples. The other half of the problem is that your
viewpoint is changing, so different samples are taken each frame, giving
rise to flicker as a window is sampled differently (or not at all) in some
frames to others. The flicker is so strong because your windows have such
high ambient values.

Increasing the radiosity quality settings (like "Count") and decreasing the
ambient setting for the windows would help, but I don't think this will
completely remove the effects - radiosity just wasn't optimised for this
sort of scene, as I understand it.

Tom

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Tom,

thanks a lot for your information. I still hope some of the POV-Ray 
developers have a chance to read this posting and will decide in the future 
to offer a solution which is not affected by ambient values and the other 
factors causing this flickering.

I will try out to reduce the ambient value, let's see how it turns out.

Greetings,

Sven

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