First an addendum to my above upload: The detailed displacement on the mountain comes from a customised version of Mr_Lamppost's clip file "Quick Voronoi Cracks".
Yep, I was anticipating a comment re the horizontal noise lines on the near to mid flat terrain; a combination of the detailed ground with small fake stones and the low-angled pov. Below are some of the render settings I used:
Detail = 0.9, AA = 9, GI Rel Detail = 2, GI Samp Quality = 3, Detail Blur on default 8, Supersamp Prepass checked.
On the Extra tab: Pixel Filter = Mitch-Net, AA Bloom checked, Detail Blending = 0.
I know the noise would have all but disappeared if I'd used the Cubic B-Spline pixel filter. However I don't like using this filter as it softens the render too much for my liking. I'll try upping the AA to something like 12, and the GI Rel Detail to 3, and GI Samp Quality to 4 on a crop render to see if that makes a difference.
Does anyone know if the Blending Detail control on the Extra tab will help eradicate such noise?
Any other advice on this matter will be appreciated.
John.