What you’re looking for is a version of what’s called “fog of war”. You can do this using a post process volume.
This video introduces the concepts surrounding it, but you’ll need to change it to get the exact effect you’re looking for:
What you’re looking for is a version of what’s called “fog of war”. You can do this using a post process volume.
This video introduces the concepts surrounding it, but you’ll need to change it to get the exact effect you’re looking for: