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Suppose you decide to take a walk through on of your preferred deserts.
Suppose that mr. X, the famous action painter, decides that same day, to
paint the desert from a balloon...
The image imposed itself while working with John VanSickle's height_field
patchwork macro, in combination with some slope texture. Hidden in this
landscape is an image from Sam Benge's Kingdom code used in a complex
averaged pigment. The blocks are pixels in fact.
This is a wip. Still some radiosity issues (see shadowed angles of the
blocks).
Thomas
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Attachments:
Download 'The Painted Desert_01.jpg' (254 KB)
Preview of image 'The Painted Desert_01.jpg'
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Cool idea.
In case you hadn't noticed, there's a lack of shadow behind the guy's heel too.
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"Kyle" <hob### [at] gate net> schreef in bericht
news:dipm64d2q3ns0e6e2e3i1kg5rgo3lf6etc@4ax.com...
> Cool idea.
>
> In case you hadn't noticed, there's a lack of shadow behind the guy's heel
> too.
Yes, I had noticed. What worries me now is that even better radiosity
settings and a black plane below the height_field do not change anything...
This reminds me of something...but what??
Thomas
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Really nice, I luv it :-)
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"LightBeam" <seb### [at] gmailcom> schreef in bericht
news:486b951d@news.povray.org...
> Really nice, I luv it :-)
Merci :-)
Thomas
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Kyle <hob### [at] gatenet> wrote:
>
> In case you hadn't noticed, there's a lack of shadow behind the guy's heel too.
I've had that problem when working on small scales, but not on a scale that i
feel should challenge POV's floating point accuracy. As far as i can
determine, it's a bug. I haven't brought it up in these newsgroups because i
haven't yet reproduced in in a simple scene.
Post a reply to this message
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"Cousin Ricky" <ric### [at] yahoocom> schreef in bericht
news:web.486f07c34ab32a2c85de7b680@news.povray.org...
> Kyle <hob### [at] gatenet> wrote:
>>
>> In case you hadn't noticed, there's a lack of shadow behind the guy's
>> heel too.
>
> I've had that problem when working on small scales, but not on a scale
> that i
> feel should challenge POV's floating point accuracy. As far as i can
> determine, it's a bug. I haven't brought it up in these newsgroups
> because i
> haven't yet reproduced in in a simple scene.
>
That is interesting. The scale is reasonably scaled in the present scene.
For instance, the figure is scaled to 0.2 from original, so nothing extreme
here. However, I am not sure how the hf subdivision in John VanSickle's
macro might influence the foreground scaling, although the final hf is
scaled up.
Thomas
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"Cousin Ricky" <ric### [at] yahoocom> wrote in message
news:web.486f07c34ab32a2c85de7b680@news.povray.org...
> Kyle <hob### [at] gatenet> wrote:
>>
>> In case you hadn't noticed, there's a lack of shadow behind the guy's heel
>> too.
>
> I've had that problem when working on small scales, but not on a scale that i
> feel should challenge POV's floating point accuracy. As far as i can
> determine, it's a bug.
It's a feature! POV-Ray has to avoid self shadowing, actually I've meanwhile
checked
the sourcecode to confirm my statements made in this thread:
http://news.povray.org/47fbebb1$1@news.povray.org
Maybe this "epsilon value " should be made adjustable by the user?
Thomas, I'm quite sure this is your problem, especially as you say you scaled
your
poser figure by 0.2 and I usually scale them by a factor of 200.
-Ive
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"Ive" <lil### [at] hotmailcom> schreef in bericht
news:486f692a$1@news.povray.org...
> It's a feature! POV-Ray has to avoid self shadowing, actually I've
> meanwhile checked
> the sourcecode to confirm my statements made in this thread:
>
> http://news.povray.org/47fbebb1$1@news.povray.org
>
> Maybe this "epsilon value " should be made adjustable by the user?
>
>
> Thomas, I'm quite sure this is your problem, especially as you say you
> scaled your
> poser figure by 0.2 and I usually scale them by a factor of 200.
>
Ive, thank you for reminding me of that thread!! I forgot about it. Maybe
this will help also for the height_field? I shall experiment by upscaling
the whole scene.
Thomas
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"Ive" <lil### [at] hotmailcom> wrote:
> "Cousin Ricky" <ric### [at] yahoocom> wrote in message
> news:web.486f07c34ab32a2c85de7b680@news.povray.org...
> > Kyle <hob### [at] gatenet> wrote:
> >>
> >> In case you hadn't noticed, there's a lack of shadow behind the guy's heel
> >> too.
> >
> > I've had that problem when working on small scales, but not on a scale that i
> > feel should challenge POV's floating point accuracy. As far as i can
> > determine, it's a bug.
>
> It's a feature! POV-Ray has to avoid self shadowing, [...]
That makes sense. (Moves from "bug" to "feature" cubby hole.)
> Maybe this "epsilon value " should be made adjustable by the user?
I have an old book, _The Elements of Programming Style_, and it says not to use
absolute epsilons. Never having written a ray tracing program myself (always
on my to-do list since i'd first heard the term, if not before), i don't feel
right telling the POV team what to do. Not that i could demand my money back
or anything. ;-)
Post a reply to this message
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