On 24-12-2018 12:52, clipka wrote:
> Am 24.12.2018 um 08:45 schrieb Thomas de Groot:
> ...
>> #declare F_hf =
>> function {
>>    pigment {
>>      image_map {
>>        tga "My_image.tga" gamma 1.0
>>        map_type 0
>>        interpolate 2
>>      }
>>      //adding some warp
>>    }
>> }
> ...
>> However, I do not know /why/ the artefacts happen, nor if this should 
>> be expected or not.
> 
> Interpolation I presume. Unless you specify the "once" keyword, at the 
> edges the image is interpolated with the opposite edge.

Ah! That is an interesting thought. Never thought of it but makes sense. 
I shall investigate. I'll come back.

Thanks! and Merry Christmas!

-- 
Thomas

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