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Update:
A link to this detailed analysis of the vase has just been posted.
https://unsigned.io/granite-artifact/
I'll be out to work and then doing things this afternoon, but maybe if others
are interested, they can read, play with it, write some macros and scenes, etc.
- BW
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From: Thomas de Groot
Subject: Re: Request: HIGH resolution stl conversion to mesh / mesh2
Date: 1 Mar 2023 08:21:04
Message: <63ff5140$1@news.povray.org>
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Op 27-2-2023 om 03:22 schreef Bald Eagle:
> Height is 4.72 inches
> Radius of body is 1.67 inches
>
Ok. I used this to apply to the vase in my studio setup.
1- I converted inches to centimeters
2- I used the following code by Alain to scale the vase to POV-unit scale:
http://news.povray.org/povray.newusers/thread/%3C60c8e000%241%40news.povray.org%3E/
3- I scaled the object the object to Real World sizes
The result is attached. Note that the grid on the pedestal is a 1 meter
square corresponding to 1 POV-unit. Subdivisions in 10 centimeter
squares. The grid was applied as an object pattern to the texture of the
pedestal.
--
Thomas
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Attachments:
Download 'predynastic_vase_06.jpg' (58 KB)
Preview of image 'predynastic_vase_06.jpg'
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From: Thomas de Groot
Subject: Re: Request: HIGH resolution stl conversion to mesh / mesh2
Date: 1 Mar 2023 09:08:00
Message: <63ff5c40@news.povray.org>
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Op 1-3-2023 om 12:12 schreef Bald Eagle:
> Update:
>
> A link to this detailed analysis of the vase has just been posted.
>
> https://unsigned.io/granite-artifact/
>
> I'll be out to work and then doing things this afternoon, but maybe if others
> are interested, they can read, play with it, write some macros and scenes, etc.
>
>
To answer (part of) the questions of the author, see for instance:
https://www.oocities.org/unforbidden_geology/ancient_egyptian_stone_vase_making.html
--
Thomas
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From: Thomas de Groot
Subject: Re: Request: HIGH resolution stl conversion to mesh / mesh2
Date: 2 Mar 2023 08:59:31
Message: <6400abc3@news.povray.org>
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Op 25-2-2023 om 16:20 schreef jr:
> cheer away :-) link to 6.1M zip, 17M mesh. looks unchanged, afaict. (started
> playing with a rose quartz material, so sample scene is .. untidy)
>
> <https://drive.google.com/file/d/11yr1A4GXITRcXe-YZFwRRybKmaij9e8H/view?usp=sharing>
>
>
Somehow, I am snowed under by all the messages on miscellaneous subjects
lately (and other matters) that I must have missed your contribution. :-/
I added the granite_21 texture and got this. Indeed, the mesh is as
smooth as the earlier/heavier ones.
So, what does it say about the /need/ for POV-Ray use of such a 'heavy'
mesh? I guess that for most cases we could do with less. It is a pity
that Poseray does not allow for simplifying meshes, only subdividing it
further (afaik).
--
Thomas
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Attachments:
Download 'vase_3.jpg' (91 KB)
Preview of image 'vase_3.jpg'
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From: Paolo Gibellini
Subject: Re: Request: HIGH resolution stl conversion to mesh / mesh2
Date: 2 Mar 2023 16:56:52
Message: <64011ba4$1@news.povray.org>
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Il 01/03/2023 12:12, Bald Eagle ha scritto:
> Update:
>
> A link to this detailed analysis of the vase has just been posted.
>
> https://unsigned.io/granite-artifact/
>
> I'll be out to work and then doing things this afternoon, but maybe if others
> are interested, they can read, play with it, write some macros and scenes, etc.
>
> - BW
>
>
The analysis is very thorough, are you the author of the pictures?
Paolo
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Paolo Gibellini <p.g### [at] gmail com> wrote:
> The analysis is very thorough, are you the author of the pictures?
>
> Paolo
Nope. That's Mark Qvist. I got in touch with him through github, and he's
supposed to get back to me sometime soon. :)
Check this out too:
https://twitter.com/mariusderomanu3
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hi,
Thomas de Groot <tho### [at] degrootorg> wrote:
> Op 25-2-2023 om 16:20 schreef jr:
> > cheer away :-) ...
> Somehow, I am snowed under by all the messages on miscellaneous subjects
> lately (and other matters) that I must have missed your contribution. :-/
it is small. </grin>
> So, what does it say about the /need/ for POV-Ray use of such a 'heavy'
> mesh? ...
had not realised earlier that a scale-correct 1:1 representation is the goal.
but in light of that, I'd argue that while it's a WIP, the highest possible
resolution, then scale down for use. (much like oversizing a render (gut
feeling))
regards, jr.
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From: Thomas de Groot
Subject: Re: Request: HIGH resolution stl conversion to mesh / mesh2
Date: 3 Mar 2023 08:27:27
Message: <6401f5bf$1@news.povray.org>
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Op 3-3-2023 om 12:25 schreef jr:
> had not realised earlier that a scale-correct 1:1 representation is the goal.
> but in light of that, I'd argue that while it's a WIP, the highest possible
> resolution, then scale down for use. (much like oversizing a render (gut
> feeling))
>
Well, there is no specific goal afaiac, except if one wants to use
Granite_21 in a 'natural' way, then it might be important. However, that
is a choice and all options are free of course. ;-)
...and when we want to reproduce the object at its true size/aspect.
--
Thomas
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Thomas de Groot <tho### [at] degrootorg> wrote:
> Op 3-3-2023 om 12:25 schreef jr:
> > had not realised earlier that a scale-correct 1:1 representation is the goal.
> > but in light of that, I'd argue that while it's a WIP, the highest possible
> > resolution, then scale down for use. (much like oversizing a render (gut
> > feeling))
> >
> Well, there is no specific goal afaiac, except if one wants to use
> Granite_21 in a 'natural' way, then it might be important. However, that
> is a choice and all options are free of course. ;-)
>
> ...and when we want to reproduce the object at its true size/aspect.
Well, there are different goals at different stages.
The first goal was to rapidly get a very nice looking render with the Granite_21
material to show off POV-Ray's textures and the potential for
near-photorealistic render quality.
The second is to poke around the mesh and examine whatever features may present
themselves, given that we have a very high quality mesh, and the tools to play
with normals, lighting, signal processing, trace (), and anything else you can
think of.
Here's a sort of uv-unwrapped render of the outer and inner surfaces, done with
trace (), 2 arrays, and 4 million triangles. I still need to correct the
scaling and positioning of the lower color_map. <eyroll>
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Attachments:
Download 'vasesurface.png' (113 KB)
Preview of image 'vasesurface.png'
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hi,
"Bald Eagle" <cre### [at] netscapenet> wrote:
> ...
> Here's a sort of uv-unwrapped render of the outer and inner surfaces, ...
wow, neat. (what do you (collective) make of the interior? paint?)
regards, jr.
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