clipka <ano### [at] anonymousorg> wrote:
> Am 21.03.2011 14:37, schrieb Trevor G Quayle:
> > Ive<ive### [at] lilysoftorg>  wrote:
> >> You have some quite distracting color banding on the rear wall and you
> >
> > I've noticed this.  This looks like it is coming from the very dim 'fill'
> > lighting I am using along part of the projector beam.  The light intensity is
> > right near the bottom of the colour depth so it tends to get stepped.  I tried
> > it with HDR image type output and the banding disappears (converting the HDR
> > back to JPG or PNG reintroduces it).  I may either have to adjust how I approach
> > this light, adjust the texturing to better mask it, or just get rid of it
> > completely.
>
> For a PNG file without colour banding, you may want to use dithered
> output (+TH). (You can also try it for JPG, though I'm not sure whether
> that will improve results.)
>
> Alternatively, you can convert the HDR or EXR output using Ive's "IC"
> ("Image Converter", see http://www.lilysoft.org/IC/ic_index.htm), which
> does a much better job at avoiding color banding than most other image
> manipulation/conversion software.

I tried the converter, the banding is still there.  I may have a look at the
dithering.

-tgq

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