POV-Ray : Newsgroups : povray.binaries.images : Floors, rails, stairs and roofs, detail! Server Time
1 Feb 2023 20:48:51 EST (-0500)
  Floors, rails, stairs and roofs, detail! (Message 11 to 13 of 13)  
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From: jr
Subject: Re: Floors, rails, stairs and roofs, detail!
Date: 4 Dec 2021 06:15:00
Message: <web.61ab4d63ae5fec9ea8869266cde94f1@news.povray.org>
hi,

"Bill Pragnell" <bil### [at] hotmailcom> wrote:
> Here's a few images from within the structure.
> ...

completely unrelated, thought of your work when I saw this image on the BBC
website:
<https://ichef.bbci.co.uk/news/976/cpsprodpb/8CDE/production/_121926063_gettyimages-1236902705.jpg>

:-)


regards, jr.


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From: Samuel B 
Subject: Re: Floors, rails, stairs and roofs, detail!
Date: 4 Dec 2021 18:25:00
Message: <web.61abf88fae5fec9cb705ca46e741498@news.povray.org>
"Bill Pragnell" <bil### [at] hotmailcom> wrote:
> Here's a few images from within the structure.
>
> I added a randomized camera to put the viewer on a random floor, and spent some
> time detailing the various components so it stands up to closer scrutiny. This
> also revealed a whole slew of placement bugs that didn't really show up on the
> distant view. The rails, posts and corner posts are now predeclared meshes, so
> parsing time has gone down and the memory footprint should be smaller.
>
> There's still some things I want to improve - there are some big gaps at the end
> of the railings in some cases, I'd like to add some textures, and possibly a
> couple more objects (e.g. planters). If I can maintain the momentum, I'll also
> play with the environment and placement structure a bit...

Hi Bill,

It looks great! In addition to planters, perhaps some lamps here and there would
look nice. Since you're using UberPOV, maybe you could take advantage of that
feature which speeds up a render when using many light sources. (Do you know
what that feature is called, btw? Iirc, it pretty much stops evaluating a light
source after a certain distance...)

Sam


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From: Bill Pragnell
Subject: Re: Floors, rails, stairs and roofs, detail!
Date: 5 Dec 2021 10:20:00
Message: <web.61acd849ae5fec9b96893c06f35e431@news.povray.org>
"Samuel B." <stb### [at] hotmailcom> wrote:
> It looks great! In addition to planters, perhaps some lamps here and there
> would look nice. Since you're using UberPOV, maybe you could take advantage of
> that feature which speeds up a render when using many light sources. (Do you
> know what that feature is called, btw? Iirc, it pretty much stops evaluating a
> light source after a certain distance...)

Yes, I'd forgotten about that! I just looked it up, it's standard behaviour in
UberPOV to cut off light sources that use fade_distance using the global
adc_bailout to assess when they're no longer contributing significantly. It can
also be overriden with the max_distance light source item.

(https://github.com/UberPOV/UberPOV/blob/master/changes.txt)

I've always thought this should be a standard tweak to base POV-Ray, multiple
fading light sources are always dead slow to use in any significant number, and
this seems like an easy optimization. Buildings with many rooms that are all
shadowed from one another is such an obvious use case, and using light groups to
achieve the same effect is such a hassle.

Bill


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