There are some missing transition effects that have been bugging me for a long time.
What I want to do:
(a.) Slide a new scene from the bottom over the current scene. I can do this with the "fromBottom" effect.
(b.) Slide the new scene back down revealing the old scene behind it.
(b.) isn't possible to do.
The transition effect "fromTop" will slide the "old" scene down from the top. "slideDown" will do the same and also push the other scene down.
Both of these effects are visually incorrect as the old scene is perceived as already being behind the new scene. What is required is to have an effect where the scene being transitioned to is put behind the currently visible scene and then have that scene slide down (or in whichever direction) to reveal the other scene behind.
The only visually acceptable workaround I have at the moment is to do a "crossFade" transition for (b.).