Le 2010-06-04 21:52, SharkD a écrit :
> On 6/4/2010 9:05 PM, Alain wrote:
>> For the density. It would remain almost constent near the axis of
>> rotation, then increase somewhat faster as you get nearer to the outer
>> surface. I'd go for proportional to the square of the radius. At least,
>> it looks reasonable to me. Use a cylindrical pattern:
>> density{cylindrical poly_wave 0.5 density_map{[0 1][1,0.3]}}
>>
>> Your cloudy "sky" looks out of place here. A large transparent area,
>> while good to get some natural light, is a great structural weakness,
>> not to mention that that area is lost from the ocupancy potential of the
>> station. If it's just a decoration for the inabitants, it's even worst.
>> Also, as the illumination seems to come from that bright axial beam, it
>> should be constant everywhere.
>>
>> If you want your buildings to taper toward the top, I suggest using
>> prisms instead of simple boxes. But, unless a building is particularly
>> broad, there is no real reason that they should'nt have a constant width.
>>
>>
>>
>> Alain
>
> Thanks for the comments. Do I need to scale the density file to the
> scale of my scene?
>
> The "sky" is also meant to place the opposite side in shade in order to
> produce "night". I've tried other methods like placing a sleeve around
> the lamp, but due to radiosity the opposite side is then never fully in
> the dark. I.e. the "bright" side casts reflected light onto the supposed
> "dark" side.
>
> As for loss of occupancy, you're assuming people want to live in zero G.
> Only the areas near the surface have suitable "gravity".
>
> The "sky" does look ugly though.
>

Yes, you need to scale the cylindrical pattern to the radius of the scene.

For the "night", in an environment such as that station, there is never 
one, and it's quite realistic that there should be no dark side.
If they want a "night", they should do it by turning off the central 
glowing beam, or dim it down. There is absolutely no reason to have 
areas dark while other are brightly illuminated, it's the same hour and 
time of the day everywhere. Have you seen Babylon 5? It's a very good 
example of a spining cylindrical space station.

For the loss of ocupancy, I mean loss of living surface due to the "sky" 
area, not going all the way up to the axis.


Alain

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