Stellaris blend_post_effect Command
This command can be used to blend into a new post effect setting, relative to the specified type, transition duration and mode.
The post effect setting you wish to blend.
The duration of the transition from the current effect (or mode) to the specified post effect setting.
The mode of the post effect setting you wish to set.
Adjust the settings below to automatically generate a command. Once you've got everything right, hit the Copy button and paste it into the console in Crusader Kings 2.