I made an SSLT test a couple of months ago (for my own purposes), but maybe it
will be useful for others to see. It's a 2-part animation.

A round object isn't the best kind of object to test it with; I was mostly
concerned with what the *embedded* objects might look like 'under the surface'
(I was probably expecting them to be somewhat visible there, like a stick
embedded into translucent wax. But I probably didn't do the test correctly, or
left something out code-wise. Or maybe I was expecting to see something that
wouldn't be there anyway.)

The test has some varying SSLT paremeters, to show the overall effect. The 1st
part of the video shows the stochastic 'noise' that occurs with a low samples
count. The 'multiplier' that's mentioned in the 2nd part of the video is meant
for the 'translucency' value... like  rgb multiplier*(1,1,1).

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Attachments:
Download 'sslt_test_1.mp4.mpg' (3623 KB)

On 02/06/2018 09:17 PM, Kenneth wrote:
> I made an SSLT test a couple of months ago 

Hmm, this video doesn't really work for me. (Linux/vlc)
I can see the individual frames, but they don't play smoothly.
It goes 1 through 10, then holds 10 for awhile (while the timer 
continues) and then picks up for a bit at frame 120 for a bit, etc.

-- 
dik
Rendered 920576 of 921600 pixels (99%)

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dick balaska <dic### [at] buckosoftcom> wrote:
> On 02/06/2018 09:17 PM, Kenneth wrote:
> > I made an SSLT test a couple of months ago
>
> Hmm, this video doesn't really work for me. (Linux/vlc)
> I can see the individual frames, but they don't play smoothly.
> It goes 1 through 10, then holds 10 for awhile (while the timer
> continues) and then picks up for a bit at frame 120 for a bit, etc.

Same here.  It plays then freezes, then jumps, then freezes, ....
Win 7 using VLC

I get sslt_test_1.mp4.mpg as the filename - what format did you intend to save
it as?

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dick balaska <dic### [at] buckosoftcom> wrote:
> On 02/06/2018 09:17 PM, Kenneth wrote:
> > I made an SSLT test a couple of months ago
>
> Hmm, this video doesn't really work for me. (Linux/vlc)
> I can see the individual frames, but they don't play smoothly.
> It goes 1 through 10, then holds 10 for awhile (while the timer
> continues) and then picks up for a bit at frame 120 for a bit, etc.
>

Hmm, that's interesting. I used Avidemux to assemble the animation-- using its
MPEG 4 h.264/AVC codec (from the open-source x.264) and an MP4 'container--
which usually plays fine on my Win 7 system. HOWEVER... this time, I set the
'imposed' keyframes to every 10 frames (or rather, what it calls 'GOPs'--
'groups of pictures-- I set it to '10 min' and '10 max'-- for no real reason!
Not that I *totally* understand all that stuff; Avidemux has lots of mysterious
settings, which I usually don't fiddle with.)

I'll try re-saving the animation with more 'normal' settings and re-upload it.

Thanks.

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Renamed to .mp4 and it seems to work fine in Windows Media Player.

Neat effect - sorta reminds me of those hand-drawn animations where the penciled
shadows move around like that  :)

It would be neat to make a line drawing with that and see if you get the
hand-drawn effect that way too.  Maybe with a thicker "line" and a color/clear
texture map and a noise/turbulence function thrown in.

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"Bald Eagle" <cre### [at] netscapenet> wrote:

>
> I get sslt_test_1.mp4.mpg as the filename - what format did you intend to save
> it as?

Well, MPEG 4 (.mpg) in an 'MP4' container format (which is a good standard one,
AFAIK.) The newsgroups impose an extra '.mpg' tag or file-type onto uploaded
animations. Kind of confusing. Apparently, newsgroup folks who use newsreaders
like Thunderbird (and not the web interface) don't see that extra tag, or it
isn't attached, or something. Generally, if I download my own uploaded video
(which then has the extra .mpg tag) it *generally* plays fine for me in Win 7--
depending on my player app. But sometimes I need to simply erase that extra tag,
to bring it back to  sslt_test_1.mp4

Anyway, here's a re-saved version; I hope this one plays OK for ya.

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Attachments:
Download 'sslt_test_1_redone.mp4.mpg' (3335 KB)

"Bald Eagle" <cre### [at] netscapenet> wrote:
> Renamed to .mp4 and it seems to work fine in Windows Media Player.
>
> Neat effect - sorta reminds me of those hand-drawn animations where the penciled
> shadows move around like that  :)

Yeah, I kind of like that cross-hatched look. An interesting effect, just by
itself! I *think* that if you set the samples count really low (and keep it low
during an animation-- or maybe cycle it through two different values like 7 and
8),each rendered frame will have what looks like random cross-hatching. It looks
'better' in the original animation, BTW (the individual frames); MPEG video
compression doesn't play nice with such random noise.

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On 07/02/2018 10:37, Kenneth wrote:
> dick balaska <dic### [at] buckosoftcom> wrote:
>> On 02/06/2018 09:17 PM, Kenneth wrote:
>>> I made an SSLT test a couple of months ago
>>
>> Hmm, this video doesn't really work for me. (Linux/vlc)
>> I can see the individual frames, but they don't play smoothly.
>> It goes 1 through 10, then holds 10 for awhile (while the timer
>> continues) and then picks up for a bit at frame 120 for a bit, etc.
>>
> 
> Hmm, that's interesting. I used Avidemux to assemble the animation-- using its
> MPEG 4 h.264/AVC codec (from the open-source x.264) and an MP4 'container--
> which usually plays fine on my Win 7 system. HOWEVER... this time, I set the
> 'imposed' keyframes to every 10 frames (or rather, what it calls 'GOPs'--
> 'groups of pictures-- I set it to '10 min' and '10 max'-- for no real reason!
> Not that I *totally* understand all that stuff; Avidemux has lots of mysterious
> settings, which I usually don't fiddle with.)
> 
> I'll try re-saving the animation with more 'normal' settings and re-upload it.
> 
> Thanks.
> 
> 
> 

It worked fine for me on Win7 using MPC-HC. But then I did not get the 
double mpg extension, in T/bird.

-- 

Regards
     Stephen

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On 02/07/2018 05:51 AM, Kenneth wrote:

> Anyway, here's a re-saved version; I hope this one plays OK for ya.
> 

This one works.  And I, too, use tbird, which means I got 
SSLT_test_1_redone.mp4 as the filename, not the wonky .mp4.mpg rename.

-- 
dik
Rendered 920576 of 921600 pixels (99%)

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