> Am 17.01.2014 14:34, schrieb mikaelk:
>
>> I'm not sure why the step structure. I think it maybe related to my
>> quantization
>> of data, which doesn't have enough bits.
>>
>> http://imageshack.com/a/img35/7173/6j0u.png
>
> Maybe try "interpolate 2" on the df3 you're using for the isosurface.
>

Using interpolate 2, or even interpolate 1, should reduce the stepping. 
As a side effect, it will reduce the max_gradient allowing you to use a 
smaller value, probably resulting in a somewhat faster rendering.


Alain

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