alphaQuad nous apporta ses lumieres en ce 2007/11/04 17:48:
> Jan Dvorak <jan### [at] centrumcz> wrote:
>> three layers:
>> moon (prerendered)
>> occlusion (probably grouped with the moon)
>> sky (transparent)
>> or:
>> moon (sphere)
>> an actual atmosphere (not as slow as you might think)
>>
>> the first variant is probably easier to do.
> 
> 
> pre-rendered? that draws a blank.
Pre-render:
Render the complete moon only lighted from the side with alpha chanel on: +ua.
Then use the result in the final render.
This ensure that the dark side of your moon won't let you see the stars behind it.
> 
> it seems the right way, is to do the moon as seen here,
> only with a cloud atmosphere between it and camera.
> 
> need more info on:
> sky (transparent)
> pre-rendered
> 
> 
> 
> 
> I was able to remember vicky's hair and did this.
> 
> #declare p_map1=pigment {image_map{jpeg "moon" interpolate 2 transmit all 0
> filter all 0} }
> #declare p_map2=pigment {image_map{png "moontr" interpolate 2 }}
> 
> #declare halfmoon = texture{ pigment{ p_map1} }
> 
> #declare half_moon =  material {
> texture { pigment_pattern{ p_map2}
> texture_map { [ 0 pigment{Clear} ]
>              [  1 halfmoon       ]
>            }
>      }
> 
> 
> ------------------------------------------------------------------------
> 
You used a sky_sphere, so the moon is before your "clouds".
You should use a large, filtering or transmiting sphere for your sky. Then place 
your moon outside of it. Set the background to some gray or bluish gray.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you look at a matrix transform and 
know instantly what it does.
John VanSickle

Post a reply to this message