Image #1 was generated with POV-Ray 3.7 beta 38, using the subsurface 
scattering feature. SSLT samples setting was 200, 20. Notice how the 
noise shows a distinct pattern.

Image #2 was generated with a modified beta 38, using the same 
subsurface settings, but generating SSLT sampling directions from a 
halton sequence instead of the default random generator. Notice how 
there is much less pattern in the noice.

Image #3 and #4 were generated with SSLT samples set to 2000, 200. 
Notice how the pattern in the noise, while having become significantly 
reduced, is still present with beta 38 (image #3) despite the high 
sample count, whereas there's no visible pattern remaining with the 
modified version (image #4).

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