Le 2025-04-01 à 10:52, gulino a écrit :

> height_field {
>    function 1, 2 { f_ridged_mf(x,y,z, 0.6, 3.0, 6.0, -1.0, 3.0, 3.0, 1) }
>    smooth
>    scale <400, 100, 400>
>     pigment { checker rgb 0.05 rgb 1 scale <20, 20, 20>}
>     translate <-200, -120, -200>
> }
> 
> error in: function 1, 2 { f_ridged_mf(x,y,z, 0.6, 3.0, 6.0, -1.0, 3.0, 3.0, 1) }
> 
> "Expected 'operator', ( found instead"
> 
> What is wrong?
> 
> 
1) You need to #include functions.inc before.

2) The numbers after function are the U and V resolution, or number of 
samples, used to evaluate the function when creating the height field.
Values of 1,2 mean 1 sample in the U axis and 2 samples in the V axis, 
or a line single between two points. You won't even see that in a scene. 
You need a strict minimum of 2,2.

In order to have something acceptable, a reasonable starting point would 
be something like 100,100.

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