Could use some brightening of the orange glow so that the shadows from the
columns appear more distinct.  I had to really look hard to see them.
Very neat image.

Bob

"Kari Kivisalo" <kar### [at] kivisalonet> wrote in message
news:38D### [at] kivisalonet...
|
| A splash screen for my website. Nothing special how it looks.
|
| It's a sum of 4 images: front light, back light, glow light
| and glow light + media. The idea is to separate each light source
| to it's own layer in photoshop so that their intensity and color
| can be adjusted _after_ render with full res aa image. It's also
| nice to be able to smooth the media in photoshop and use fewer
| samples :) Works only with non-gamma corrected images because
| gamma is non-linear operation.
|
| Read more about it from
| Grafica Obscura/Synthetic Lighting for Photography
| http://www.sgi.com/grafica/synth/index.html
|
|
| BTW, Photoshop doesn't seem to have ADD as layer mode so I used
|      SCREEN which looked close enough. To do these operations
|      properly for gamma corrected output would require 48 bit images,
|      ADD layer mode and preview gamma layer (which can be done in
|      photoshop with CURVES adjustment layer). I first developed
|      the image with gamma correction and when I started to use the
|      layer magic it was quite obvious 24 bits just isn't enough
|      because the images must be de-corrected before layer operations
|      and corrected again after.
|
| -----------------------------------------------------------------------
| Kari Kivisalo                                          www.kivisalo.net


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