An enemy which can only move when it is not observed

I’ve seen other stuff which kinda show me how to do it, but what is the best way to make an enemy that can only move you cannot see it? Shadows must also not be visible in order for it to move…

Anyone who can help?

You can use a Shape Trace to check if the enemy is colliding with the screen
(See bottom of that page)

the problem are the shadows since they dont have collision i cant think on a way to detect if they are on screen

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