Right, I'm finally back after Xmas family visiting all round the UK.  (Knackered, and nursing a delightful bout of flu!) I don't think, looking at the render, that it's particularly grainy, just very misty.  Is that grainyness in Carrara?

I've tried all the things you suggested and it looks pretty hopeless, no appreciable change that I can see.

I've therefore tried a checkerboard pattern on the slab under the knife, and if you look closely the more distant black square is mistier than the closer black square.  (I've saved the original render and then done another one so I could position the squares to check)

So is there some way to adjust the sky settings?  Are there any sky settings?  Maybe the mist is located there?

Or is it the material on the ground...?  Only the mist is affecting the checkerboard too...

If it's not possible to adjust the sky settings I'm thinking it's just not possible to get a decent render in Carrara at all...

Measure your mind's height
by the shade it casts.
Robert Browning (Paracelsus)

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