I'm getting closer, but not quite got it yet.
What I have are multi-image composites I shot at Cape Final, North Rim Grand Canyon.
Interesting - in the OP Landscape Annual, Jack Dykinga says the best shots of the canyon are from Cape Royal.
Cape Final is very close to Cape Royal and offers a similar view - spectacular, I'd say.
I've figured out I'm dealing with 2 problems - one is lighting differences based on the different angles.
I've managed to clone them away.
The other problem is the fall-off near the edges - good tip, John.
I've wasted the cloning work because I've figured out that I do need to backup and start over - crop first, merge second, and then clean up the edges a bit.
I'll get there.
I came; I saw; I shot; I shared.