Jay,
I did checkout JSPlacement some time ago, but it was a little glitchy on my old Win 7 machine. I tried it again on my newer Win10 machine and it works well. I have been doing some texture tests on the top dome using maps for specular and luminance from JSPlacement. The base texture is an old deathstar texture that was originally much darker but I passed it through the Colorizer shader (I love that shader) to lighten it up a bit. Here are the results of my testing:
Getting there! Thanks for your help!
Dave