How to do camera fade in C++

I have been researched this topic but there is no result, I can’t do it in matenne because the camera fade depends on some complated game states which I wrote in code. Please help

I solved this long time ago…

It’s quite simple, there’s lots of values in camera class, if I remember it right there’s a “gain” value. just tune it down and it’s a fade…
There is a value
Wonder why nobody answered…

This is quiet an elegant solution, much better than dealing with Matinee.
Thanks for this.