=?UTF-8?Q?J=c3=b6rg_=22Yadgar=22_Bleimann?= <yaz### [at] gmxde> wrote:
> Hi(gh)!
>
> On 29.12.18 23:31, Samuel B. wrote:
> > Heightmap + isosurface experiment. Sorta "meh," but promising.
> >
> What did you precisely in this scene - interpolating a heightfield using
> a function? Tell us more about it!
>
> See you in Khyberspace!
>
> Yadgar
>
> Now playing: Denis (Blondie)

Hello Yadgar,

Sorry for the late reply; I haven't been doing too good lately.

For that rendering I used a height map inside an isosurface function and a
pattern (granite iirc) for the horizontal striations, with matching pigment. The
height map itself might have been generated with a free version of World
Machine... or Terragen. Probably World Machine due to the low quality (the free
version limited the output to something like 512x512).

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=?UTF-8?Q?J=c3=b6rg_=22Yadgar=22_Bleimann?= <yaz### [at] gmxde> wrote:
> Hi(gh)!
>
> On 29.12.18 23:51, Samuel B. wrote:
> > I don't think I ever posted an updated version of the bubbles I was rendering...
> >
>
> A technical question: did you also render those 2D images with POV-Ray?
> I ask because of that still embryonal database project "POV-o-Rama" - if
> it is a true POV-Ray scene, I could include it!
>
> See you in Khyberspace!
>
> Yadgar
>
> Now playing: Tag des Herrn (Frl. Menke)

Yeah, POV-Ray was used for the 2D images.

Somewhere I also have the file to render a 3D bubble cluster (foam), but I was
never happy with the lack of meniscus(es) adjoining the bubbles, which was going
to be an expensive thing to model... either due to the complexity involved, or
the long render times...

Sam

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"Kenneth" <kdw### [at] gmailcom> wrote:
> "Samuel B." <stb### [at] hotmailcom> wrote:
>
> >
> > First up is an image of the planet Earth lit up at night. A point light was
> > placed at the very top of the sphere to project a semi-transparent image onto
> > the plane... or I used spherical inversion. Can't remember, but the result is
> > nearly the same either way. The bloom is from a newer technique that uses 2-pass
> > separable gaussian blur. Faster, but not too flexible.
> >
>
> About your first grass image: Is the gaussian blur/bloom done as a
> post-processing effect in Photoshop (or the like)? Or is it by some magical
> trick(s) within POV-Ray itself? (I assume the former.) In any case, that bloom
> adds a great deal of 'camera realism' to the grass render-- 'reducing' the hard
> edges from what are usually pin-sharp rendered objects. It looks much more like
> a real camera photo this way, IMO. (Meaning, an 'old'-style photo using actual
> film.)
>
> Really nice. Ditto your AO and SSAO experiments.

The gaussian blur was produced in two passes using POV-Ray. The idea is to blur
the image horizontally on the first pass, and then vertically on the second.
This saves a lot of computation time since the problem is no longer x_res *
y_res, but is now x_res + y_res. It's not nearly as flexible as other ways of
producing bloom effects, though...

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Paolo Gibellini <p.g### [at] gmailcom> wrote:
> Sam, I was really missing your images!
> I wish you a happy 2019, full of nice pov-ing moments ;-)
> Paolo

Hi Paolo,

I miss all you guys :) I hope to get back to rendering things again soon (when
inspiration strikes me hard enough, I guess ;) )

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