Slice Transform effect with Mask scaling works differently to Advanced Output for a slice with an Input Mask | v6.0.0

[subpixel]

1. Load and play some content in the composition.
2. Add an Advanced Output screen (with default full-screen slice).
3. Add a new slice with a source mask, eg a circular mask, and move the slice so you can see that the shape is separate to the background slice. Observe shape does NOT have a black border / bounding box - the shape has a transparent background.
4. Go back to your composition and add a Slice Transform effect for the slice with the source mask. Change Scaling to Mask. Observe that the shape DOES have a black border / bounding box. Not very helpful!

[Zoltán]

at #3

Add a new slice with a source mask, eg a circular mask, and move the slice so you can see that the shape is separate to the background slice.

source masks move together with the input slice, so moving the slice will move the input mask (slice mask).
Are you adding an output mask?

A screen recording of your steps would be very helpful to clear this up.

[Joris]

He means that slices with an input mask render with black instead of transparency in the slice transform in mask mode
.

I don't think we have a ticket for that one yet.

[Zoltán]

ok, got it, thanks!
edit: created ticket #10212