Thanks, everyone!
@ Eoin: cloud settings are close to the settings Buzzzzz posted from his "Abandoned Ship" in November (bz Cumulus.tgc):
http://forums.planetside.co.uk/index.php?topic=8003.0 I apologize for not crediting you earlier, Buzzzzz.
They are as follows:
Atmosphere:
Haze Density 1.5
Haze Exp Height 4000
Bluesky Exp Height 8000
Ceiling Adjust 7
Ceiling 56000
Floor -16000
Haze Glow Amt. 1
Haze Glow Power 0.99
Blue sky Glow amt. 0.25
Blue sky Glow Power 0.75
Enviro light 0.5
Enviro light tint 1
Ambient 0
Fake Dark Power 0
Fake Dark Sharpness 10
Bluesky density color 1
Redsky Decay Colour 0.9048
No. of samples 64
Cirrus
Cloud Alt. 12836.3
Cloud Depth 16.9001
quality 1.00611
samples 11
All other settings are default
Cumulus
Cloud Alt 9700
Cloud Depth 2453
Edge Sharpness 11.5
Cloud Density default
Coverage adjust -0.025
Cloud Colour 0.41
Cloud scattering colour 0.43
Lighting
sun glow amt 1.03
sun glow power 1.05
light propagation 1.25
light prop mix 0.55
fake internal scattering 0.2
enviro light 0.75
enviro light tint 1
Tweaks
ambient 0.1
fake dark power 0.1
fake dark sharpness 10
check 'improved lighting model'
check 'flatter base'
base wispiness 0.33
base softness 0.15
coverage gamma 0.75
Quality 3D volumetric 0.940042
no. of samples 84
set at 'optimal'
Density shader:
feature scale 1500
lead-in scale 60000
smallest scale 15
noise octaves 14
density contrast 1
coverage adjust -0.125
roughness 1.7
noise flavour perlin ridges
noise variation 1.9
bouyancy 0.5
clumping 0.95
lead-in warp amt. 0.5
Blend by shader- distance shader
far distance 30000
near distance 11000
distance mode Z depth (planar)
camera render camera
@ Martin: Used the new patched version, and thanks for the raytracer suggestion for the vegetation.
@ Bob, Eoin, njeneb and Malcolm: Thank you very much.
Linda