I find it really improved since last time.
The moons look really nice, especially the shadows that take the 
atmosphere's color. Maybe the moons' surface texture would require some 
more work, they look too much like a basic POV texture, maybe some 
normal would do the trick.

An other thing is the ground on first plan, I think it looks too smooth, 
this is due to the height field I guess, but having a stone-like normal 
for this would help.

Last thing is the top of the cliff, it looks like there is a heap of 
earth on top, while I would expect more stone layers getting smaller and 
smaller. But anyway there is a little problem of color transition 
between the cliff and the very top.

However, it's really great, and I hope you'll release the source when 
you're done.

JC

Nathan O'Brien wrote:
> Hi all,
> 
> attached is an updated land test for my landscape generator. This one took 4
> hours 33 min to render on a P4 1.8. I haven't updated the clouds yet as I'm
> still working on a set of good density definitions for high, mid and low
> altitude clouds. However I thought I'd post this image as it shows two new
> features, moons and rocks.
> 
> As others have guessed the land form is a height field. It's a function
> image based height field. To speed up the parsing times the height field is
> tiled with diminishing resolution as each tile gets further away from the
> camera. Another algorithm controls the number of tiles so that they are only
> generated if part of the tile falls within the viewing plane.
> 
> 
>

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