|
 |
<wul### [at] compuserve de> wrote:
> How can I limit fog to a certain area or volume without visibility of the
> limiting shape?
> e.g. I like to fill up one single pit with ground-fog without the infinite
> fog area around that pit.
You would be better off with scattering media for this. It is much more
flexible, and is usually used confined to a certain area.
However, you will probably want to use MegaPOV for its sampling methods
2 and 3, otherwise it will take a long time to render if you want smooth
results.
--
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
<><
Post a reply to this message
|
|
|
|
"David Fontaine" wrote:
> Make a big solid shape and add the fade_distance and
> fade_power keywords (and hollow if the camera is
> inside it, I think...).
Fog and fading are two entirely different things as you can se if you render
the code
below (requires MegaPov).
(It simulates interior fog by using an inverted object.)
You could say that if fog is like transmit, fade_color is like filter.
#default {finish {ambient 1 diffuse 0}}
box {<-3,0,7>, <3,-2,8> pigment {color <1,1,1>}}
box {<-3,0,7>, <3,+1,8> pigment {color <1,0,0>}}
box {<-3,1,7>, <3,+2,8> pigment {color <0,1,0>}}
difference {
sphere {5*z-x, 1 inverse}
sphere {0, 0.00001}
pigment {color rgbt 1}
}
fog {
fog_type 1
distance 1
color rgb <0.0,0.0,1.0>
}
sphere {
5*z+x, 1
pigment {color rgbf 1}
interior {fade_power 1 fade_distance 0.6 fade_color <0,0,1>}
hollow
}
Rune
--
\ Include files, tutorials, 3D images, raytracing jokes,
/ The POV Desktop Theme, and The POV-Ray Logo Contest can
\ all be found at http://rsj.mobilixnet.dk (updated March 29)
/ Also visit http://www.povrayusers.org
Post a reply to this message
|
|
