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Op 19/08/2020 om 14:20 schreef William F Pokorny:
> On 8/18/20 6:21 AM, BayashiPascal wrote:
>> After Thomas' splines in isosurfaces, they are quite popular nowadays
>> ! ;-)
>>
> Yes, with povr been trying to remove some of the longstanding code
> issues and functional limitations. We'll see.
>
>> Your cloud looks more like smoke to me but the idea is very
>> interesting. Thanks
>> for sharing.
>>
>
> Yes, think you are right. The core issue is similar to what Kima has
> been asking about with color depth and banding. With isosurfaces, even
> forcing a lot of rays to be shot, you always have discrete shapes /
> grains at locations, unlike a media density of some kind. The isosurface
> jitter feature of povr helps a little with this, but it currently
> jitters only 'within' the accuracy amount.
>
> If I apply some gaussian blurring with POV-Ray or external tool, I get
> something looking more cloud like, but not quite right on the fuzzy
> side. I could too probably help the cloud look by using some overall
> haze, but for this I wanted to better see the cloud structure. To
> explore / push the technique some.
>
> I'll attach another variant where I cranked down on the gradient and
> accuracy while adding a second much smaller violent turbulence. To my
> eye less cloud like still, but interesting too. Not really sure what it
> looks like... Fuzzy fabric?
>
> Aside: I reworked the fog feature in povr. Everything with it is depth
> based, but I have this rough idea forming in my head we might be able to
> do something interesting combining fog with isosurfaces of the fuzzy
> kind - maybe where some are all of the fuzzy shapes are transparent.
> Anyway, an idea for another day.
>
> Bill P.
>
Interesting work! not really cloud-like perhaps, and second one looks
very much like a soft fluffy pillow, but this could lead to many uses.
Intrigued by your fog ideas by the way... reminds me of the ghostly
df3-with-media experiments from a couple of years ago.
--
Thomas
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