Ah ok, so from testing it out, it looks like hooking in any source to ‘Matter Repair’ and changing the opacity on ‘Matte Repair’, is what I’m really looking for in Silhouette, where it “seems” to work exactly like adjusting the opacity slider of a single layer in After Effects from 100% (Fully opaque) to 0 (fully transparent showing the alpha background only). Would you agree?
Using a composite node for adjusting opacity on the foreground only seems to work when you have something hooked into the background, do I understand this correctly?
With regards to importing a something like solid red circle that shows a checkerboard/transparency in photoshop and I export it as either a PNG or TIFF with transparency, would I “always” keep either source set to Type: Straight - Unmatted? If not, when generally might I use Type: Premultiplied for my source?