Day-to-night transition into one image

I’ve shot a few day-to-night timelapses recently and had an idea to automate process of combining those images into one that would display the day-to-night transition from left to right.

I’ve used groovy shell for scripting the thing out quickly, and here is the result: Continue reading



%~dp0\groovysh " File(\"%1\").text);"

Or is there a better way to run groovysh with script file as parameter?