ISL XPeriments

[juan_irender]

Added some water...

[juan_irender]

Well, these terrain pics are a bit "commemorative", since very similar pics were produced about 30 years ago.
If Indigo gets official support for voxel rendering, then with ISL aid, we will be able to render "Mandelbulbs", a more actual fractal rendering art.

Ciao.

[juan_irender]

Hi all.
Here´s a material with a very small ISL contribution: an emitting material with some "volume", adequate for using with 3D (non planar) illuminating surfaces.
Problem is that 3D illuminating objects appears flat in renderings, with this small ISL cheat on the emission channel, we get a fresnel-type effect, darkening the center softly.
Here´s the link in the material section:
http://www.indigorenderer.com/materials/materials/1190

Hope you like it!

PD: the glowing effect is the inverse as I pretend first time: glowing at the edge, dimming at the center! Sorry.

Ciao.

[juan_irender]

Hi again.
New version of the emitter surface (v 1.5), adds two colour parameters to control the overall look, now you can achieve more natural results.

Ciao.

[CTZn]

cool. I liked the first version you removed, it was quite subtle and nice.

One thing: this does change both the look of emitters and the way they are emitting light.

[juan_irender]

Hi CTZn!
With the last version of the material, you can achieve the same look of the first version: simply choose a dark gray for the edge and white for the center.
I suppose the light color spreading are changed, but in a scene like the twiligth lighted exterior of Pibuz last renderings, I think this shortcoming will hardly be noted.

Thanks!

[OnoSendai]

Hi Juan,
These are quite intriguing renders.
Do you have any research papers / experiments this work is based on?

[Oscar J]

Looks pretty nice, but will these subtle differences be noticeable when rendering with camera tonemapping and the emitters are blown out anyway?

[juan_irender]

Hi Ono.
This material is based on an old shader trick, nothing more. A fresnel-like effect to modulate the surface colour (emitting colour in this case) depending on incidence of the ray hitting the surface.
I don't like the tipical flat look of 3d surface emitters, thats all.

Thanks.

[juan_irender]

Hi Oscar.
I hope these effects could be preserved with camera tone mapping, the pity isI have only a portable computer at hand now, so I can't do the tests I would like.
But after all, you can always use an HDR image procedure: 3 to 5 exposures and compositing with a suitable software.

Ciao.

[juan_irender]

Hi.
The emitter material put to test.
As you can see, the effect is subtle but noticeable: neon tubes looks solid, instead of flat.
Scene rendered with camera tone mapping.

Ciao.

[zeitmeister]

Very cool fresnel look!!

[juan_irender]

Glad you like it, Zeitmeister, thanks!

[Polinalkrimizei]

I'll definitely try that, what a great idea. Should be a standard setting for emitters, looks so much better I guess!!

Thanks Juan for sharing and caring.

[zeitmeister]

Yes, thanks for sharing!!