On 19-10-2016 14:09, William F Pokorny wrote:
> On 10/19/2016 07:16 AM, Thomas de Groot wrote:
>> On 18-10-2016 18:29, William F Pokorny wrote:
>>> [snip]
>>> There is a base image_map texture on a plane. Over the top of that
>>> texture is another with 5 columns of 4 colors (0,0.5,1.0,2.0) where the
>>> 5 columns have transmit values of: 0,0.5,1.0,1.5,2.0. One parallel light
>>> source, camera orthographic, ambient 0, diffuse 1.0.
>>>
>>
>> Out of curiosity: what is a transmit value >1.0?
>>
> People use >1 sometimes to amplify colors or increase contrast.
>
> I think Norbert used this technique for one of his recent,
> http://www.tc-rtc.co.uk/, metal monster images.
>
> It isn't the most stable technique as can be seen in the right part of
> the posted images. I'd say use values in the 0 to 1 range as a rule.
>
[snip]

Thanks indeed. This is an unknown effect of /transmit/ to me, in 
contrast to /filter/. Going beyond complete transparency (t=1) is not 
very intuitive :-)

I suppose that most users are unaware of this and possibly it should be 
mentioned in the docs.

-- 
Thomas

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