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Robert McGregor <rob### [at] mcgregorfineart com> wrote:
> > "Nobody, and no algorithm or trick can do that. Halos and media are
> > really different beasts. The best you can do is learn to use media,
> > then try to re-create the effect. That's a classic problem, and this
> > was always the only answer, sorry.
One of the major problems is that media density components do not
support the filter/transmit channels. This makes it impossible to
simulate certain halo effects with media. (And no, I don't think this
is a good thing, and I think media should be enhanced in this respect.)
For example having a density like this was possible with halos:
[0 rgb 1 transmit 0]
[1 rgb <1, 0, 0> transmit 1]
With current media densities it's basically impossible to get the
same effect.
--
- Warp
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That said, can anyone help me with converting the following code? Thanks!
halo
{
cubic
max_value 3 spherical_mapping glowing
colour_map {[0 color rgbt <1,0,0,1>][1 color rgbt <1,1,0,0>]}
turbulence 1.5 samples 30
}
halo
{
cubic
max_value 3 spherical_mapping glowing
colour_map {[0 color rgbt <1,0,0,1>][1 color rgbt <1,1,0,0>]}
turbulence 1.05 samples 30 scale .5
rotate y*45 translate y*1
}
-Mike
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SharkD <nomail@nomail> wrote:
> That said, can anyone help me with converting the following code? Thanks!
As I said in my post, it's not possible.
--
- Warp
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"SharkD" <nomail@nomail> wrote:
> That said, can anyone help me with converting the following code? Thanks!
>
> halo
> {
> cubic
> max_value 3 spherical_mapping glowing
> colour_map {[0 color rgbt <1,0,0,1>][1 color rgbt <1,1,0,0>]}
> turbulence 1.5 samples 30
> }
> halo
> {
> cubic
> max_value 3 spherical_mapping glowing
> colour_map {[0 color rgbt <1,0,0,1>][1 color rgbt <1,1,0,0>]}
> turbulence 1.05 samples 30 scale .5
> rotate y*45 translate y*1
> }
>
> -Mike
As Warp pointed out in his example, the transmit component (rgb*t*) isn't
possible, media ignores it. Maybe you could try using MegaPov's glow feature?
What are you trying to achieve? Can you post a sample image?
-Rob
"There is no spoon."
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"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> As Warp pointed out in his example, the transmit component (rgb*t*) isn't
> possible, media ignores it. Maybe you could try using MegaPov's glow feature?
> What are you trying to achieve? Can you post a sample image?
>
> -Rob
>
> "There is no spoon."
It's supposed to look like a flame shooting out of a rocket, I think. I'm not
sure, I haven't been able to render it myself yet.
-Mike
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"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> As Warp pointed out in his example, the transmit component (rgb*t*) isn't
> possible, media ignores it. Maybe you could try using MegaPov's glow feature?
> What are you trying to achieve? Can you post a sample image?
>
> -Rob
>
> "There is no spoon."
Has a free version of MegaPov been released yet? I thought it was still in
development.
-Mike
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"SharkD" <nomail@nomail> wrote:
> Has a free version of MegaPov been released yet? I thought it was still in
> development.
>
> -Mike
MegaPov has always been free - the latest "official" unofficial release was just
over a year ago. It's just like POV-Ray with lots of additional features built
in:
http://megapov.inetart.net/
-Rob
"There is no spoon."
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"Robert McGregor" <rob### [at] mcgregorfineartcom> wrote:
> MegaPov has always been free - the latest "official" unofficial release was just
> over a year ago. It's just like POV-Ray with lots of additional features built
> in:
>
> http://megapov.inetart.net/
>
> -Rob
>
> "There is no spoon."
Ah, I must be confused. I thought there was an add-on/POV variant that was
shareware.
-Mike
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> That said, can anyone help me with converting the following code? Thanks!
>
One way to convert an old 3.5 halo is to break the single
halo statment into three media statments, with each of
the medias representing a single RGB color.
So...
halo
{
cubic
max_value 3 spherical_mapping glowing
colour_map {[0 color rgbt <1,0,0,1>][1 color rgbt <1,1,0,0>]}
}
becomes something like...
material {
texture {
pigment {Clear}
}
interior {
media {
emission <1,0,0>
density {
spherical
color_map {
[0 rgb 0]
[1 rgb 1]
}
}
}
media {
emission <0,1,0>
density {
spherical
color_map {
[0.0 rgb 0]
[0.25 rgb 0]
[0.5 rgb 0.1]
[1.0 rgb 1]
}
}
}
// blue media left off because it's all zero
}
}
Note the uneven density of the green, this is because the
falloff of green values is not linear in the halo, it's a
combination of color fade and transparency fade.
To get a good result you need to experiment with the
density maps, it's not an exact match.
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"Robert McGregor" <rob### [at] mcgregorfineartcom> schreef in bericht
news:web.4875721a85f76549bd1b3ad10@news.povray.org...
> "SharkD" <nomail@nomail> wrote:
>> Has a free version of MegaPov been released yet? I thought it was still
>> in
>> development.
>>
>> -Mike
>
> MegaPov has always been free - the latest "official" unofficial release
> was just
> over a year ago. It's just like POV-Ray with lots of additional features
> built
> in:
>
> http://megapov.inetart.net/
>
That was for Mac if I am reading correctly, wasn't it? Latest for Windows
was in 2005.
Thomas
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