Hi Ross and Bob,

I saw the film the last weekend. There was a topic from the last year
here related on lasers you could search it.

Regards,
Oleguer





news:42adcec3$1@news.povray.org...
> "Ross" <rli### [at] everestkcnet> wrote in message
> news:42ada0e8$1@news.povray.org...
>> Hi. After seeing Star Wars this past weekend
>
> Hiya Ross. I still haven't seen the Episode 3 yet. Sounds like it had
> something for you, at least.
>
>> was thinking of a laser blast. I managed to get a nice green laser
>> by using two emissive medias, one with a green cylindrical density and 
>> one
>> with a white cylindrical density slightly smaller than the green, all
>> contained in a CSG merge of a cylinder and two spheres. It looks pretty
>> good
>> I think. I know that emmisive media doesn't really emit light, but I was
>> naively expecting that it's color would affect nearby objects when
>> radiosity
>> is used, in the same way that a white sphere would pick up some green 
>> from
>> a
>> green wall. in the global settings, media was set to "on".
>
> Should be okay then. media on goes in radiosity block, just so you weren't 
> mistakenly putting it into global_settings only.
>
>> Is the above the expected behavior of emitting media? if this is the
>> expected behavior, how would you go about faking a green light emitting
>> from
>> the media? just attach a small light_source to the laser blast object 
>> with
>> a
>> suitable fade power and fade distance?
>
> area_light like that could enhance it a lot, sure, but then you need to
> either let it interact with the media or tell it not to.
>
> Checking here with a test media object and radiosity I see you might need 
> to
> increase 'count' to 500 or more, especially if the laser isn't in close
> proximity to the other scene objects. Perhaps even increasing 'brightness'
> to more than 1. In fact, there might be other settings which could prove
> better but it looks to me like a light would be less likely to cause 
> trouble
> such as radiosity can if you attempt to maximize the interactions from it
> (texture tweaking, etc.).
>
> Bob Hughes
>
>
>

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