@MenelaosAs far as I know it is not possible to play Transition or Hanging clips in fullscreen scenes.
I have seen on very rare occasions one of the "spinning" transition clips play but there are no commands I know of to specifically enable them.
Swing clips should play but bear in mind you have to change the positioning for them. All clips except swing clips are referenced to the bottom of the screen. Swing Clips have to be positioned in the scene at the top of the screen.
The attached is a screencap of a mod I did for the Totem Background 2D Scene to play Swing clips.
For the Clip Definition I used
clip {
id: Clip
allow: top
//deny: behindtable
}
where "top" is the parameter for swing clips.
For positioning the swing I used
clipSprite {
pos: 400, -35
scale: -1.0, 1.0, 1.0
standingHeight: 380
source: Clip
}
EDIT
In fact I think the original Background 2D scene will play swing clips. The only thing that is disallowed are Behind Table clips. The scene was written before Swing Clips were made. With the default positioning you will not see the swing clips because they are positioned below the bottom of the screen. You may occasionally see the top bit of the ropes using the original positioning.