Keep up the good work!

It would be nice if this could be incorporated into my nxplanets planet 
creator (on the Pov-Ray object collection) or something similar.   =]

Does you system hide stars in daytime and show them at night?

-Nekar Xenos



"Bruno Cabasson" <bru### [at] cabassoncom> wrote in message 
news:op.us5o01drm1sclq@pignouf...
> Le Sun, 19 Apr 2009 23:20:47 +0200, Bill Pragnell

>
>> Tricky things, clouds. All my previous experiments with media clouds
>> have been
>> slow, unrealistic, and fiddly. Gilles' df3 technique is sly, and his
>> example
>> images beautiful. However, I've always wanted a cloud macro that will
>> 'just
>> work' in a scene, without the need for external tools and without the
>> memory
>> consumption of hi-res df3s.
>>
>> This image is a decent result from a set of macros I've recently been
>> developing
>> - it rendered in ~30 mins on my 1.8GHz macbook, which I think is very
>> good for
>> 'pure' object-pattern-based media (this is without aa - unfortunately it
>> takes
>> a lot longer with aa).
>>
>> Using a blob as the pattern template makes the rendering much quicker,
>> and
>> lowering the media aa_level is also a great speedup I'd never tried
>> before. My
>> basic cloud macro currently has 11 parameters, which sounds like a lot,
>> but this
>> includes location and size, turbulence, solidity and so on, which makes
>> tweaking
>> a lot easier. I've also got a quality parameter, the lowest setting of
>> which
>> just uses the solid blob objects - very handy for shape and location
>> checks
>> (and also looks pretty surreal!).
>>
>> Anyway, this is a wip so I'll post more interesting results as I get
>> them...
>
>
> Hello POVers.
>
> Perhaps some people here will remember me. It's a loooong time I was not
> present among the POV community. Real life took me away from you (sigh...)
> for months and from my POV-related projects. The main project is still
> alive and is called TerraPOV. It deals with landscape scenes, inspired by
> Terragen, and I was mainly focusing on atmosphere and cloudscapes, which
> is a difficult exercise if you want to have quite-realistic results. I had
> some encouraging renders. I came back on POV forums and to TerraPOV
> recently. My new machine (overclocked Q6600) allows a step forward. I feel
> like I can say something on this thread about clouds.
>
>
> TerraPOV has 3 major dimensions:
>
>     1) Atmospheres & cloudscapes/single could
>     2) Terrain generation/texturing
>     3) Preview & other user-friendly features
>
> I also remember that I promessed you a tutorial for the principles ruling
> TerraPOV's atmophere & clouscape system. I will keep my promess soon.
>
> Here are a few things I can get, among them is the last render I got last
> night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous test
> scene, but with higher settings. The problem I have now is to find a
> solution for multi-layer cloudscapes because monte-carlo integration can
> only be in a single container. Until now, cloud layers are contained
> within spherical shells. I am currently trying to find a way to have
> multiple layers (2 or 3 are enough for most cases) within a single shell
> container without setting too many intervals or samples for the media.
>
> The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis' shows
> what can happen with 2 layers, which is more visible at low elevations
> (resp 3deg and 18deg). The bottom layer is dark because integration only
> occurs within the shell and does not take into account what happens above.
> You can see that the top layer bahaves as It could be expected.
>
>
> I am very happy to be back, and I sincerely hope I can get regular
> availability and time here. It is always a nice pleasure to be with people
> around here.
>
>
> Bruno
>
> -- 

> http://www.opera.com/mail/

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