|
 |
"Sven Littkowski" <sve### [at] jamaica-focus com> wrote:
> Hello Eagle Sun,
>
> I am trying out your macros but I need to know, which which options you are
> using them for your Saturn scene. Can you publish how you call these marcos?
>
> Only then I can try to help. I first need to re-achieve your results in
> order to understand the problem.
>
> Greetings,
>
> Sven
Here's the way I call it....
Saturn(0, 5, 0, 120, 0, -23.7)
TerragenViewFrom(1.414, 326381.5, 0, 0, 0)
If you mean "Atmosphere_Option", I chose "5". But same phenomenon is
reproduced no matter which option I choose.
The "TerragenViewFrom()" macro looks like this:
#macro TerragenViewFrom(_zoom, _fromobject, _shift_x, _shift_y, _shift_z)
camera
{
direction <0, 0, _zoom>
up y*image_height/image_width
right x*PixelRatio
look_at <_shift_x*unitscale, _shift_y*unitscale, _shift_z*unitscale>
location <0, 0, -(_fromobject*unitscale)>
}
#end
Here are comments that will provide a bit more explanation...
// Stars_Crackle(_heading, _pitch, _bank)
// Planet(_distance, _hour, _year, _heading, _pitch, _bank)
// Satellite(_sun, _distance, _hour, _year, _heading, _pitch, _bank)
// TerragenViewFrom(_zoom, _fromobject, _shift_x, _shift_y, _shift_z)
I've also tried a wide range of values for max_trace_level from 5 to 20.
The phenomenon has never gone away. As far as I can tell.... the objects
are 1) Isosurface, 2) hollow sphere with media (3), and 4) disks. At most
extreme liberal thought, I can't see any reason to go higher than 8.... but
what do I know, I'm a beginner.
Any planet image may be used for the map.
Let me know if you need more info...
Post a reply to this message
|
|
|
|
Tim Nikias <JUS### [at] gmxnetWARE> wrote:
> EagleSun wrote:
> > I'm working on the planets in an up-coming Star Wars movie, and I've ran
> > into a peculiar phenomenon, trying to
> >
> > render rings around a planet produces an artifact where the rings cut away
> > the atmosphere of the planet. For the
> >
> > model, I use Saturn.
> >
> > Here is the source code that reproduces the phenomenon...
> >
> SNIP
>
> The discs have to be hollow.
WHOAH! No wonder.... I would never have thought of it... but why? When I
tried it, I got this.... (see image)
Post a reply to this message
Attachments:
Download 'hollow-disks.png' (201 KB)
Preview of image 'hollow-disks.png'
|
|
|
|
> WHOAH! No wonder... I would never have thought of it... but why?
When > I tried it, I got this.... (see image)
Looks fine to me: shadow from the planet onto the rings, from the rings
onto the planet... If there's anything wrong with that, add some
no_shadow keywords. Or, if you're spotting some other problem through
those various layers of objects and their media-hulls, try raising
max_trace_level.
Regards,
Tim
--
aka "Tim Nikias"
Homepage: <http://www.nolights.de>
Post a reply to this message
|
|
|
|
Tim Nikias <JUS### [at] gmxnetWARE> wrote:
> > WHOAH! No wonder... I would never have thought of it... but why?
> When > I tried it, I got this.... (see image)
>
> Looks fine to me: shadow from the planet onto the rings, from the rings
> onto the planet... If there's anything wrong with that, add some
> no_shadow keywords. Or, if you're spotting some other problem through
> those various layers of objects and their media-hulls, try raising
> max_trace_level.
>
> Regards,
> Tim
Oh... it looks great to me too..... all I mean is... why did "hollow on"
work so well? And why did "hollow off" cut away the atmosphere? Just
trying to learn POV-Ray...
Post a reply to this message
|
|
