hi,

Thomas de Groot <tho### [at] degrootorg> wrote:
> alright. Getting tired after a day of tweaking.

glad you did though, "Flanders Gray (tm)" looks ready for turning into kitchen
worktops.  :-)  (am interested to see it being used other than in a
demo/reference image)


regards, jr.

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Thomas de Groot <tho### [at] degrootorg> wrote:
> alright. Getting tired after a day of tweaking.
>
> Second, overhauled, StepNoise version. Several things learned:
>
> - to be careful with the /scale/ of the grains. This is as good as I
> dare to go. Larger minerals become increasingly unbelievable, so one
> needs to find the balance (as with the turbulated cells obviously, but
> StepNoise does a much better, although not perfect, job).
>
> - the mask for the pigment_pattern needs a /very/ careful adjustment.
> The present one is good but could probably be improved further. Good
> enough for now.
>
> - white grains are present but hardly visible. In the first version they
> were placed at the wrong place within the colour_map, rendering rings
> instead of mineral grains. Corrected that but need now to be enhanced a bit.
>
> - sslt would probably increase realism, even in the frosted version. I
> am going to look into that.
>
> --
> Thomas

I am embarrassed to say that I can't see anything from that far. With respect to
that 10cm grid measures, I feel like you are no longer representing the same
rock? Did you work on it like that or with a closer camera? I do feel like
nothing is wrong with what little I see, though ! I have faith in you ! :-)

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Op 29-4-2021 om 19:21 schreef Mr:
> I am embarrassed to say that I can't see anything from that far. With respect to
> that 10cm grid measures, I feel like you are no longer representing the same
> rock? Did you work on it like that or with a closer camera? I do feel like
> nothing is wrong with what little I see, though ! I have faith in you ! :-)
> 
The 'problem' with changing patterns or pattern modifiers, is that 
scales get changed too. In a sense, you are right: it is not the same 
rock indeed and you need to readjust your frame of reference. Don't let 
it fool you: that 10cm grid does not represent anything real; I have 
always bee troubled by those quasi-real measurements (I am going to take 
out those cm-values and replace them by Martian Claw Units). My believe 
is that size/dimensions in POV-Ray are dimensionless as it were and only 
meaningful in relation to recognisable objects.

I attach a version with the material scaled by two. Still looking good, 
imo, and much better than the cells pattern.

-- 
Thomas

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Attachments:
Download 'dakotagrains_sn_test3.jpg' (91 KB)

Preview of image 'dakotagrains_sn_test3.jpg'

scaled by four; starting to break down I think, but still believable.

-- 
Thomas

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Attachments:
Download 'dakotagrains_sn_test4.jpg' (84 KB)

Preview of image 'dakotagrains_sn_test4.jpg'

Thomas de Groot <tho### [at] degrootorg> wrote:
> scaled by four; starting to break down I think, but still believable.

Have you tried doing a sequence of objects, with changing smooth-step thresholds
to see what effect that has?   There's also the amount of turbulence applied
which will affect how the underlying pattern looks.

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Op 30/04/2021 om 19:57 schreef Bald Eagle:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> scaled by four; starting to break down I think, but still believable.
> 
> Have you tried doing a sequence of objects, with changing smooth-step thresholds
> to see what effect that has?   There's also the amount of turbulence applied
> which will affect how the underlying pattern looks.
> 

Not yet, but good suggestion. Had something like that on my ToDo list. 
Want also to try sslt... and object-scale vs landscape-scale use... Too 
many balls in the air atm.

-- 
Thomas

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Op 29/04/2021 om 17:56 schreef jr:
> hi,
> 
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> alright. Getting tired after a day of tweaking.
> 
> glad you did though, "Flanders Gray (tm)" looks ready for turning into kitchen
> worktops.  :-)  (am interested to see it being used other than in a
> demo/reference image)
> 
I certainly agree with that. something is planned in that way.

-- 
Thomas

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hi,

Thomas de Groot <tho### [at] degrootorg> wrote:
> Op 29/04/2021 om 17:56 schreef jr:
> > ... (am interested to see it being used other than in a
> > demo/reference image)
> >
> I certainly agree with that. something is planned in that way.

personally, I'd love something .. surreal/"strange".  like a space station, or
perhaps that natty pre-war flatbed truck you used before, modelled in various
granites.  :-)


regards, jr.

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Op 1-5-2021 om 09:40 schreef jr:
> hi,
> 
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> Op 29/04/2021 om 17:56 schreef jr:
>>> ... (am interested to see it being used other than in a
>>> demo/reference image)
>>>
>> I certainly agree with that. something is planned in that way.
> 
> personally, I'd love something .. surreal/"strange".  like a space station, or
> perhaps that natty pre-war flatbed truck you used before, modelled in various
> granites.  :-)
> 
Oh lol! That last one would be interesting! I shall see what I can do.

I was thinking, among other things, about the El Capitan half dome...
https://en.wikipedia.org/wiki/El_Capitan

Note that granitic landscapes/formations look rather featureless as far 
as textures are concerned. They have no/little internal layering, and 
weathering is mostly 'rounding' the rocks.

-- 
Thomas

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hi,

Thomas de Groot <tho### [at] degrootorg> wrote:
> Op 1-5-2021 om 09:40 schreef jr:
> > Thomas de Groot <tho### [at] degrootorg> wrote:
> >> Op 29/04/2021 om 17:56 schreef jr:
> >>> ... (am interested to see it being used other than in a
> >>> demo/reference image)
> >>>
> >> I certainly agree with that. something is planned in that way.
> >
> > personally, I'd love something .. surreal/"strange".  like a space station, or

incongruous rather than strange.


> > perhaps that natty pre-war flatbed truck you used before, modelled in various
> > granites.  :-)
> >
> Oh lol! That last one would be interesting! I shall see what I can do.

uh, nice.


> I was thinking, among other things, about the El Capitan half dome...
> https://en.wikipedia.org/wiki/El_Capitan
>
> Note that granitic landscapes/formations look rather featureless as far
> as textures are concerned. They have no/little internal layering, and
> weathering is mostly 'rounding' the rocks.

had not heard of 'El Capitan' before.  900+ metres of sheer cliff, just .. wow.
 cannot really imagine, but feel one would feel distinctly ant-sized standing at
its base.  (America, huh?  _everything_ is big in America!  :-))


regards, jr.

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