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5 Jul 2022 10:51:26 EDT (-0400)
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From: dick balaska
Subject: Re: Default values in v3.8.0
Date: 20 Sep 2018 18:46:15
Message: <5ba42337$1@news.povray.org>
On 09/20/2018 06:43 PM, dick balaska wrote:

> 
> The quickres.ini he mentions does not have "Right" as an attribute (just
> Width, Height, and Antialias foo). So 1280x720 *will* look different
> then he has previously seen.  It will be more correct :) but it will be
> different.

That was a dumb statement.  There is no camera in quickres, so there
couldn't be a "right".


-- 
dik
Rendered 1024 of 921600 pixels (0%)


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From: Kenneth
Subject: Re: Default values in v3.8.0
Date: 20 Sep 2018 20:05:01
Message: <web.5ba434a7c511635aa47873e10@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Am 20.09.2018 um 22:19 schrieb Kenneth:

> > I don't usually mess with   right  x*image_width/image_height...
>
> Presuming that by "I don't usually mess with..." you mean "I usually
> use..." (as opposed to e.g. "I don't even try to use..."), there's no
> need to worry.
>

Yeah, that's the case-- I always specify right... in a camera, but almost always
leave it alone (at the default.)


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From: Mike Horvath
Subject: Re: Default values in v3.8.0
Date: 20 Sep 2018 20:21:16
Message: <5ba4397c$1@news.povray.org>
On 9/20/2018 8:00 PM, Kenneth wrote:
> clipka <ano### [at] anonymousorg> wrote:
>> Am 20.09.2018 um 22:19 schrieb Kenneth:
> 
>>> I don't usually mess with   right  x*image_width/image_height...
>>
>> Presuming that by "I don't usually mess with..." you mean "I usually
>> use..." (as opposed to e.g. "I don't even try to use..."), there's no
>> need to worry.
>>
> 
> Yeah, that's the case-- I always specify right... in a camera, but almost always
> leave it alone (at the default.)
> 
> 

By specifying `right` you are not using any defaults at all. The 
defaults only come into play when you *don't* specify `right`.


Mike


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From: clipka
Subject: Re: Default values in v3.8.0
Date: 20 Sep 2018 22:58:12
Message: <5ba45e44$1@news.povray.org>
Am 21.09.2018 um 00:43 schrieb dick balaska:
> On 09/20/2018 05:47 PM, clipka wrote:
>> Am 20.09.2018 um 22:19 schrieb Kenneth:
> 
>>
>> Also, white makes for nice images if you're really just interested in shape.
> 
> Isn't like a mid-grey the accepted graphics "standard" for "nothing".

Mid-grey is certainly /one/ standard, but it is not the only one - white
being another (e.g. the default material for geometric primitives in DAZ
studio).

White has the decided advantage over mid-grey in that it is well-defined
in terms of gamma: White is always white.

Also, with `diffuse` defaulting to a value below 1.0, it is effectively
not pearly white.


> The quickres.ini he mentions does not have "Right" as an attribute (just
> Width, Height, and Antialias foo). So 1280x720 *will* look different
> then he has previously seen.  It will be more correct :) but it will be
> different.

It will be more correct for people who don't use the `right
x*image_width/image_height` idiom. Which is pretty much the point of it ;)


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From: clipka
Subject: Re: Default values in v3.8.0
Date: 20 Sep 2018 23:09:33
Message: <5ba460ed$1@news.povray.org>
Am 21.09.2018 um 02:21 schrieb Mike Horvath:
> On 9/20/2018 8:00 PM, Kenneth wrote:
>> clipka <ano### [at] anonymousorg> wrote:
>>> Am 20.09.2018 um 22:19 schrieb Kenneth:
>>
>>>> I don't usually mess with   right  x*image_width/image_height...
>>>
>>> Presuming that by "I don't usually mess with..." you mean "I usually
>>> use..." (as opposed to e.g. "I don't even try to use..."), there's no
>>> need to worry.
>>>
>>
>> Yeah, that's the case-- I always specify right... in a camera, but
>> almost always
>> leave it alone (at the default.)
>>
>>
> 
> By specifying `right` you are not using any defaults at all. The
> defaults only come into play when you *don't* specify `right`.

Absolutely right.

(Irresistible.)


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From: Kenneth
Subject: Re: Default values in v3.8.0
Date: 21 Sep 2018 07:30:01
Message: <web.5ba4d4a7c511635aa47873e10@news.povray.org>
Mike Horvath <mik### [at] gmailcom> wrote:

>
> By specifying `right` you are not using any defaults at all. The
> defaults only come into play when you *don't* specify `right`.
>

Oh.  I actually had to look that up in the docs-- it's been ages since I read
those sections. (I rarely if ever think about right, up etc). Just to clarify, I
always use AND specify
          right  x*image_width/image_height

Honestly, I thought that was the default(!). But I see that 4/3*x or <1.33,0,0>
is the real one. I can't recall when I started using one vs. the other-- it
was in the dim and murky past!

Thanks for the clarification.


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From: clipka
Subject: Re: Default values in v3.8.0
Date: 21 Sep 2018 07:35:41
Message: <5ba4d78d$1@news.povray.org>
Am 21.09.2018 um 13:24 schrieb Kenneth:

>           right  x*image_width/image_height
> 
> Honestly, I thought that was the default(!).

Well, it is now ;)

> But I see that 4/3*x or <1.33,0,0>
> is the real one.

The latter actually. Which means that by default the aspect ratio wasn't
even really fitting for classic 4:3 images.


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From: Jim Holsenback
Subject: Re: Default values in v3.8.0
Date: 22 Sep 2018 18:40:49
Message: <5ba6c4f1$1@news.povray.org>
On 9/19/18 4:46 PM, clipka wrote:
> In POV-Ray v3.8.0, default values will be chaned as follows:

haven't started on this yet...a quick glance was all i did for now but i 
/think/ i've already done some of them. i'm burnt so give me a bit


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From: clipka
Subject: Re: Default values in v3.8.0
Date: 22 Sep 2018 20:14:22
Message: <5ba6dade$1@news.povray.org>
Am 23.09.2018 um 00:40 schrieb Jim Holsenback:
> On 9/19/18 4:46 PM, clipka wrote:
>> In POV-Ray v3.8.0, default values will be chaned as follows:
> 
> haven't started on this yet...a quick glance was all i did for now but i
> /think/ i've already done some of them. i'm burnt so give me a bit

The new `ambient` and camera defaults are indeed already doc'd, so it's
a matter of finding a good place to document the new pigment colour (the
old default of pitch black doesn't seem to be explicitly mentioned) and
to overhaul the behaviour of the `#version` statement with respect to
the defaults.

Nothing too urgent I think, so no pressure.


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From: Jim Holsenback
Subject: Re: Default values in v3.8.0
Date: 30 Sep 2018 18:06:55
Message: <5bb148ff$1@news.povray.org>
On 9/22/18 8:14 PM, clipka wrote:
> Am 23.09.2018 um 00:40 schrieb Jim Holsenback:
>> On 9/19/18 4:46 PM, clipka wrote:
>>> In POV-Ray v3.8.0, default values will be chaned as follows:
>>
>> haven't started on this yet...a quick glance was all i did for now but i
>> /think/ i've already done some of them. i'm burnt so give me a bit
> 
> The new `ambient` and camera defaults are indeed already doc'd, so it's
> a matter of finding a good place to document the new pigment colour (the
> old default of pitch black doesn't seem to be explicitly mentioned) and
> to overhaul the behaviour of the `#version` statement with respect to
> the defaults.
> 
> Nothing too urgent I think, so no pressure.
> 

for default pigment just a brief /change/ annotation:
http://wiki.povray.org/content/Reference:Pigment

i created a talk page for the rest:
http://wiki.povray.org/content/Reference_Talk:Version_Directive

i cleaned up the intro paragraph. after the syntax diagram i grouped the 
expanded discussions together. followed by examples.

in the 1st paragraph after the syntax at the sentence... As with version 
3.8 or later... things kind of fell apart for me. what you had written 
just didn't make any sense so that was the best i could do. please 
review and edit on the talk page.


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