On 26-3-2017 18:29, Zeger Knaepen wrote:
>> To my knowledge, only Zeger Knaepen and Jaime Vives Piqueres have added
>> this feature to their landscape scenes, both back in 2004 so I do not
>> know who was first.
>
> Jaime was first :)

Thanks! Good to know. ;-)

>
>> - I studied both their - admittedly - very complex /isosurface/
>> landscapes and extracted the relevant codes for my own designs.
>
> I used height_fields, no isosurfaces
>

Both, I would say. In the scene from you I studied, there was a 
isosurface/height_field switch, based on a Shape_Quality parameter.

-- 
Thomas

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