EDIT: we are not looking for closed alpha tester anymore, see below, a first public release is available in the SketchUp Extension Warehouse: https://extensions.sketchup.com/extension/db87ad90-4b9c-45a0-8d39-a0bd011c8cf2/kg-dev-bulk-alot-lay-out-update-references-and-rerender-2019 Ready to start updating your layout files without even opening layout?
We have created an MVP of a tool that does just as the title says: automatically (re)render SketchUp viewports in LayOut documents, in a bulk fashion and without opening LayOut.
We are looking for a limited number of people willing to test this alpha and see how it performs. Currently the tool only works on Windows and contains no UI, but at the core, it should do what it says it does. A quick video showing the functionality can be found here: https://www.youtube.com/watch?v=ANer7BVrR5E&feature=youtu.be
If interested, please send a private message.