The D3 images I’ve taken so far made me suspect a too-strong anti-aliasing (AA) filter. But that seems inconsistent with the strong aliasing in images like this one, similar to what I’ve seen with medium-format digital backs that lack an AA filter. The pattern seen in this actual pixels crop occurs over large areas of the image, though it comes and goes according to the detail level, ranging from no effect at all to prominent aliasing (horizontal short green stripes and colored speckles throught). The Nikon Capture NX “Color Moiré Reduction” has no effect on it.
Nikon D3 + Zeiss ZF 50/2 Makro-Planar, actual pixels, ISO 800