Found what was causing it - No matter what is set to contribute to it, far shadow distance needs to be set to zero for static shadow maps to be shown by a stationary lights on static objects. The part in the linked post “The dynamic shadow casting distance will light everything within it’s set distance dynamically. If an actor is set to use only static lighting it will not have any shadow casting until it is outside of the dynamic distance range.” is what put me onto this. Of course because we used to be using full dynamic we had this distance set to non-zero and hence were getting non-default results from the setup.
3 Likes