> Am 31.01.2014 20:40, schrieb Franz von Dardel:
>> I came across a file with a height field given in the following manner:
>>
>> #declare Coul= pigment { color rgb <0.4,0.2,0>}
>>
>> height_field {
>>      pattern 100,100 {
>>          hf_gray_16
>>          cylindrical color_map { [0 rgb 0] [1 rgb 1] }
>>          translate 1
>>          scale .3
>>      }
>>      //smooth
>>      pigment {Coul}
>>      clipped_by {plane {-y,-.05}}
>>      scale <5,2,5>
>> }
>>
>> POV gives an error about "pattern":
>> Parse Error: Expected 'map file spec', pattern found instead
>> but I could not find the way to produce a height field without a GIF
>> or PNG, or
>> a function. Is there a way to correct or convert the above lines?
>
> I think this should do the job (untested):
>
> height_field {
>       function 100,100 { pigment {
>           hf_gray_16
>           cylindrical color_map { [0 rgb 0] [1 rgb 1] }
>           translate 1
>           scale .3
>       } }
>       ...
> }
>

I'm not sure about the hf_gray_16 in this context... Maybe it just does 
nothing.
Up to version 3.6.x, it was to be used in the global_settings block to 
output the image as a 16 bits gray level image.
With version 3.7, you use a command line switch to do the same.

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