hide object in render, i try solutions not working

thanks for help
Create a new level
Try to move all assets to that level
Now put the new level as sublevel of your main level
Hide that newly created level
Now Try!
To add on to @Ornob1’s suggestion, you can move all your actors to a new sublevel and make sure the steaming method is set to “Blueprint”. That way, the contents of the level will never be loaded into game unless specifically called.
It is very odd that the “Hidden in Game” isn’t working for you, though, as rendering should trigger the game state.