Ah, so it doesn't show shadows on parallax maps. I'll work on a fix and will give you a message when the update is online!
Edit: Fixed
Hi! So I've tested with Galv Layer plugin and it still working for me. May I see the setting you used for Galv? Like the Layer ID Image Xshift Y shift.... stuff? If possible, please connect to my Discord and send me a video there!
Discord: https://discord.gg/YKPscqHV8b