On 3/8/2017 12:30 AM, Mike Horvath wrote:
> On 3/7/2017 4:09 PM, omniverse wrote:
>> Mike Horvath <mik### [at] gmailcom> wrote:
>>> I am trying to render the following isosurface.
>>>
>>> isosurface
>>> {
>>>  function {fFinal(fInpX(x,y,z),fInpY(x,y,z),fInpZ(x,y,z))}
>>>  threshold 0
>>>  accuracy 0.001
>>>  contained_by
>>>  {
>>>   box {0,1}
>>>  }
>>>  max_gradient 50 // was 20000
>>> }
>>>
>>> However, from certain angles there appear gaps or cuts in the surface,
>>> and you can see inside. The gaps disappear when viewed from other
>>> angles.
>>>
>>> Does anyone have any tips on how to fix this? I already tried scaling by
>>> 200 but it does not help.
>>
>> The outer box isn't there but I'm guessing your isosurface is part of
>> CSG, so
>> maybe if you add all_intersections or max_trace 3 (or whatever
>> integer) might
>> fix it.
>>
>
> I tried your suggestion and took the isosurface out of the union it
> belonged to:
>
> isosurface
> {
>     function {fFinal(fInpX(x,y,z),fInpY(x,y,z),fInpZ(x,y,z))}
>     threshold    0
>     accuracy    0.001
>     contained_by
>     {
>         box {0,2}
>     }
>     max_gradient    50    // was 20000
>     all_intersections
>     max_trace 3
> }
>
> But it did not solve the problem. I still get the jagged looking artifacts.
>
>
> Mike

Here it is again with pigment and scaling:

#declare ScaleAmount = 400;

isosurface
{
	function {fFinal(fInpX(x,y,z),fInpY(x,y,z),fInpZ(x,y,z))}
	threshold	0
	accuracy	0.001
	contained_by
	{
		box {0,2}
	}
	max_gradient	50	// was 20000
	all_intersections
	max_trace 3
	pigment {pigmentRGB}
	translate	<-1/2,-1/2,-1/2>
	rotate		y * clock * 360
	scale		ScaleAmount
}

Mike

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