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Interesting. I, too, thought about concepts how to make a cave. :-)
It's a good idea.
My method would have been to create an iso surface and divide this from
a box. The resulting difference would be the cave. For the stalagtites
and -mites I would have used blobs. But that was my way, your way is
interesting and good, too. :-)
On 29.02.2016 05:44, Jaime Vives Piqueres wrote:
> Hi:
>
> Here is a new scene on the making... a cave with stalactites and
> stalagmites. The rough shape is a mesh created with Wings3d, then I
> added a heighfield for the ground, and thrown some isosurface rocks
> using trace(). Finally, also using trace(), I added some stalactites and
> stalactites, which are cone-shaped isosurfaces. The water is currently a
> simple plane, but should evolve into a heighfield. And yes, there will
> be crystals there at some point, but for the moment I'm just looking for
> comments/suggestions about the cave itself.
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Here my suggestion for the illumination:
an irregular hole somewhere at the ceiling, where some light rays come
in and are even visible in the dusty air inside the cave. Some radiosity
and air that distributes the light further. Maybe a seedling or small
plant in the center of the light. :-)
On 29.02.2016 11:23, Stephen wrote:
> On 2/29/2016 2:44 PM, Norbert Kern wrote:
>> It's dark in caves -
>>
>> Norbert
>
> Just a gentle reminder that TC-RTC finishes today (GMT) and all entries
> need to be rated. :-)
>
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El 29/02/16 a las 14:54, Stephen escribió:
> On 2/29/2016 12:40 PM, Jaime Vives Piqueres wrote:
>> Well, after looking at images from these amazing caves, I hope
>> you're joking... it would be terrifically difficult to go for
>> something even remotely resembling that.
>
>
> They do use coloured lights around the rocks and in the water, you
> know. :-)
>
Yes, I know... I was referring to the intricate shapes of the
stalagmites and stalactites.
--
jaime
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El 29/02/16 a las 14:44, clipka escribió:
> Stalactites and stalactites, and I guess more stalactites, right? And
> of course stalactites ;)
>
Yeah, I know what you mean... :) At the moment there are only
stalactites paired with corresponding stalagmites, but there should be a
lot of more think stalactites all around the ceiling.
> Looks fascinating.
>
Thanks, it's also terrifically slow to render when you add area light,
focal blur and radiosity, to not talk about the suggested sss and wet
reflections. I'm not the kind of guy who waits patiently for a week to
complete a render...
--
jaime
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> It's dark in caves - therefore I'm used to cave images lighted with
> torches, head lamps or other other point lights. I expect strong
> specular reflections and light fading - especially in humid caves.
>
> With this lighting the cave looks "flat" - I'm sure you are aware of
> this.
Yes, it was only a test render of the shapes, so I wanted everything
visible. The final lighting should be "natural", maybe looking from the
interior to the entrance with a sunny exterior, or perhaps with a hole
on the ceiling as Sven suggested. But the torches idea is tempting... ;)
--
jaime
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> I'd say that shape-wise, you're off to a good start so far.
>
Thanks!
> Your material texturing probably needs to have some more ---
> differentiation. In my mind's eye, I conceive of layers and strata
> and veins of different minerals and sediments, and oxides, and
> benthic layers, etc. The homogeneous red-rust-brown looks like
> someone sprayed it with pigment or rusty water.
Yes, it was just the first texture I came up with... but making
something remotely credible in geological terms is going to be difficult.
> as for real caves - browse around and see what _you_ think.
> https://www.google.com/search?q=caves
I already did that search, and it's bookmarked for reference. :)
--
jaime
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El 29/02/16 a las 18:05, Sven Littkowski escribió:
> Here my suggestion for the illumination:
>
> an irregular hole somewhere at the ceiling, where some light rays
> come in and are even visible in the dusty air inside the cave. Some
> radiosity and air that distributes the light further.
Yes, that was one of my first ideas for the lighting. It's the most
"pretty" among the candidates.
> Maybe a seedling or small plant in the center of the light. :-)
Maybe a crystal cluster better? ;)
--
jaime
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El 29/02/16 a las 18:01, Sven Littkowski escribió:
> My method would have been to create an iso surface and divide this
> from a box. The resulting difference would be the cave.
I discarded that one without testing it first, because in my mind it
sounded way too slow to render.
> For the stalagtites and -mites I would have used blobs.
I've thought about blobs, as I did use them for a cavern on a very old
IRTC entry... they can give more realistic "accumulative" shapes, but I
fear they will look too smooth.
--
jaime
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Stephen <mca### [at] aol com> wrote:
> Just a gentle reminder that TC-RTC finishes today (GMT) and all entries
> need to be rated. :-)
>
> --
>
> Regards
> Stephen
Oh, I'd rated last week. Since most guys sent 2 or 3 images, I don't expect a
number of ratings anywhere near of the number of entries.
Norbert
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Jaime Vives Piqueres <jai### [at] ignoranciaorg> wrote:
> I discarded that one without testing it first, because in my mind it
> sounded way too slow to render.
Can you do the difference, convert it to a mesh, and THEN render it?
Maybe use a heightfield?
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