With those darned cylinder lights what matters most is the tightness
value. If too low they are only bright centrally, however this doesn't
appear to be a problem here since the image is fully engulfed in light
and I don't see a central high intensity. Bet you already knew about
cylinder lights though.
That intervals versus color saturation is an interesting notion. I
noticed that the less intervals was the more full color (red 1 for
instance) there is instead of whiter and whiter when increased. Although
there is a mixture of both I've seen. Speckled mess usually too. I would
think it may have more to do with your overlapping colored rays of
light.
Was there 'absorption' in there?
'media' still befuddles me much :)


Ken wrote:
> 
>   Actually I lost a lot of the color I was getting when I increased the
> intervals for the final image. At 5 intervals the colors were noticable
> but the reduction of particle size associated with the high interval
> rate lost some of it's ability to carry the light color with it. I used
> a setting of 45 for this image to reduce the horrible blotchyness you
> get at lower numbers. It may also have to due with my choosen media
> reaction color setting in the media statement to some extent.
> 
>   The transmit function is not a good choice for this operation. You
> want to filter the color of the light having the image map add it's
> color to the light passing through it. Transmit passes the original
> color of the light and not the color of the material it passes through.
> Yes I relied upon filter and not transmit for the projected image and
> color dependancy.
> 
>   Certainly there are areas for improvement and as I mentioned in my
> original post this was a proof of concept image and not a work of
> art. I think I proved the concept with this test and the rest is
> mearly an exersize in optimizing the parameters to use and finding
> the appropriate backgound to highlight the effect.
> 
>   In retrospect I wish I had placed the projection window close to a
> corner and then had the opposing wall that made the other half of the
> corner the surface that recieved the projected image. I am almost
> positive the distance the light must travel has an impact on how well
> the media interacts with the light source.
> 
>   Having said that it occurs to me that I may not have used a high
> enough intensity level for the cylinder light used to carry the image
> maps color through the medium. I had is set to rgb 5 which as I think
> about it is somewhat on the low side for this process application.
> Higher values would most likely have increased the color density seen
> in my example and is certainly warrents further exploration.
> 
> Comments ?
> 
> --
> Ken Tyler
> 
> mailto://tylereng@pacbell.net

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