I have finally made this tutorial. This shows to make a simple canyon scene. It is mostly a material tutorial and briefly touches in with atmosphere.

Here: http://vimeo.com/2914203
Final Image: Click to view attachment
About 4 minutes @ 640x480 4pass on a Macbook Pro

Booster Pack with Project file and textures:
Click to view attachment
Note: Large size because the textures (6 or 7 full resolution textures)
WARNING: Booster pack comes with a 10k patch terrain so be aware it may be slow to open project.

Hope it helps shed some light on making bitmap materials.

Photoman

very cool, thanks!

Thank you, its tuts like this that help to advance the community.

Spoke to soon. I get a permission denied when I click the link.

Which link, the vimeo one should work.

The Vimeo does not work for me

Click to view attachment

I also get a "Permission Denied" error when I click on the link.

Ok fixed now. My browsers auto fill put the privacy setting to no one