Why does 'CC Composite' have an offset in AE CC2019?

[auked14779739]

I use 'CC composite' all the time, but this week I started working in CC2019 and some of my comps gave all sorts of artifacts and edge problems. I figured out that it was the CC composite. I haven't found any other posts about it.

To go a bit more into depth. It's only in specific cases that the "CC composite"-effect works differently in CC2018 then in CC2019. In most cases, you won't see a difference, but combining certain blurs on multiple layers gives the CC composite a bit of an offset to the upper left.

Let me give an example: A simple comp with three layers. The two upper ones are adjustment layers. The bottom one is a black solid.

- The top adjustment layer has an opacity of 50% and has a "CC Composite" effect on it

- The middle adjustment layer has an opacity of 1% and has a "Fast Box Blur" with a radius of 20

- the bottom solid is has an opacity of 100% and has a "Circle" effect on it (Radius:10, Blending Mode: Normal), then there is a "Fast Box Blur"(Blur Radius:5) or "Directional Blur"(blur Length:5)

If you have a comp like this, in AE CC2018 you'll see one dot and in AE CC2019 you'll see two dots. The CC Composite effects give the original dot an offset two the upper left. And I assume that the offset is based on the the bounding box of the calculated effects since the position of the 'ghost dot' can be changed by changing the direction of the 'Directional Blur' or by changing the blur dimensions of the 'Fast Box Blur'

I've filed a bug report, but I'm wondering: Has anyone else encountered this problem?

I've uploaded the example AE-file to dropbox

https://www.dropbox.com/sh/l6q8m6i4rbk51lo/AABkutB1bsWZq_TgE6_-NR1Va?dl=0

[VL!]

Hi have the same kind of problems.

I have a pile of effects to create a shadow over a character that I normally blend with a CC composite, but since I have updated to AE  2019, I have a problem of offset too.

My shadow is not where it should be.

I don't even use a effect layer.

I have not found any solution for now and it is really bothering.

Have anyone found something?

[Roei Tzoref]

- The middle adjustment layer has an opacity of 1% and has a "Fast Box Blur" with a radius of 20

if you change that adj layer (layer 2) to "repeat edge pixels" it looks ok.

I see I am experiencing the same shift here. probably a bug, or maybe a feature fix... can't tell which result should be more accurate if toggling the repeat edge pixels fixes it and it should be turned on anyway if you don't want alpha on the edges of your adj layer