Fade Filter Question

I'm not very familiar with fade filters, but I was wondering if it is possible to create a fade filter ingame when cinematic mode isn't on... If so, are the player's allowed to still have their mouse and hotkeys and keyboard still functioning? If not, could I do Enable User Control to do this?

I know it is possible because Doom implements this, a skull.tga splashes when u die.

Are players still able to use their user controls however while the filter is in effect?

I believe that you are allowed to still move and control your units as long as cinematic mode is off.

Oh goodie goodie!

Yes, you can easily play while fade filters are on, but by my experience, no tooltips are displayed at that time.

...Hermmmm, that might be a problem, but I don't think it'll be much of a problem.