POV-Ray : Newsgroups : povray.binaries.images : Floors, rails, stairs and roofs, detail! : Re: Floors, rails, stairs and roofs, detail! Server Time
13 Jun 2024 18:38:53 EDT (-0400)
  Re: Floors, rails, stairs and roofs, detail!  
From: Bill Pragnell
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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