On 12/6/2016 2:05 AM, Mike Horvath wrote:
> I am having trouble rendering the attached scene without artifacts and
> gaps in the isosurface. I already increased the scale of the scene by
> 200 and the max_gradient of the isosurface to 100. Anyone have any tips?
>
> Mike

I tried with Wikipedia's conversion formula as well, with no difference 
in the render.

// Wikipedia calculations
#declare funcLUV2XYZu = function(L,U,V) {U/13/L + uPrime}
#declare funcLUV2XYZv = function(L,U,V) {V/13/L + vPrime}
#declare funcLUV2XYZa2 = function(L,U,V) {XYZWhiteReference2 * select(8 
- L, pow((L + 16)/116, 3), L * pow(3/29, 3))}
#declare funcLUV2XYZa1 = function(L,U,V) {funcLUV2XYZa2(L,U,V) * 9/4 * 
funcLUV2XYZu(L,U,V)/funcLUV2XYZv(L,U,V)}
#declare funcLUV2XYZa3 = function(L,U,V) {funcLUV2XYZa2(L,U,V) * (12 - 3 
* funcLUV2XYZu(L,U,V) - 20 * funcLUV2XYZv(L,U,V))/4/funcLUV2XYZv(L,U,V)}

Mike

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