I have a composition of a keyboard with each key to light up on a note. I make the keyboard and several checkbox controls for the highlight. Now I put the keyboard composition as a layer in a composition that has all the note info.

Why can't I make the checkboxes inside the composition available to the layer so that I can have multiple note arrangements using the same keyboard composition? I can't make this link without hard-coding the composition name into the keyboard composition. So I have to make a duplicate keyboard for each composition I want to use it in.

It would be nice and efficient if I could toggle a button on these so when I drag keyboard comp into a new composition, it has the controls inside available on the layer instance.

If you resize the composition using the "Crop Comp to Region of Interest" feature in version 17.5.1, there will be a difference in the display between 2D and 3D layers with the same X and Y numbers.
It didn't happen in versions prior to 17.1.4.

The following reproduction procedure
1, Creating a composition
2, Create a new layer
3, Resize the composition using "Crop Comp to Region of Interest"
4, Check the 3D layer.

Other than "Crop Comp to Region of Interest", the same phenomenon occurs when resizing with "Composition Settings / Advanced / Anchor" selected other than the center.
Also, if you open a project file saved in version 17.5 or later in version 17.1.4 or earlier, the displayed position will change.

The workaround I've found is to place the camera layer to restore the display.

Thank you.

ist not the first request of this kind, but i still miss folders in the comp/timeline window for more comfort. it not always make sense to have something in a pre comp – especially when its animated – and to jump back and forth to adjust keyframes. it would be so great to have it all in one comp and just pack layers into folders and giving them a mask too. the set mask option does not compensate the miss of folders with masks – just think of a photoshop without folders for big composition jobs – unthinkable today : )

a big comp with many layers in after effects could be clear and structured with folder and a time saver.

I encountered a phenomenon that the preview freezes when processing in a specific order on Windows version cc2020 (17.1.4).
It occurred even if I tried it on another PC in the same environment.

Steps to occur

1. Create a composition. (Including precompose)
   ↓


2. Read the aep file.
   ↓


3. Duplicate the composition created before reading the aep file on the project window.
   ↓


4. Duplicate the duplicated composition further. (The preview of the composition you create later will not be updated.)
   ↓


5. If you erase the layer in the composition that was duplicated for the second time after the preview freezes,
   You will be notified of the error "After Effects error: strange situation [0/1]. (26, 82)".
   (Even if you delete the layers of other compositions, you will not be notified of the error.)

that's all

When I tried it,
It occurred even if I did not perform 1 to 5 in succession with another work between the steps.
Clearing the cache didn't fix it.
It was fixed when I reopened the project.
It did not happen in Windows version cc2019 (16.1.3).

Thank you and best regards,

Windows版cc2020(17.1.4)で特定の順序で処理を行うとプレビューが固まる現象に遭遇しました。
同じ環境の別のPCで試しても発生しました。

発生する手順

　1、コンポジションを作成する。（プリコンポーズも含む）
　↓
　2、aepファイルを読み込む。
　↓
　3、aepファイルを読み込む前に作成したコンポジションをプロジェクトウィンドウ上で複製する。
　↓
　4、複製したコンポジションを更に複製する。(以降作成するコンポジションのプレビューが更新されなくなります。)
　↓
　5、プレビューが固まる現象が出た後に2回目に複製したコンポジション内のレイヤーを消すと、「After Effects エラー：strange situation[0/1].(26、82）」とエラーの通知が出ます。（他のコンポジションのレイヤーを消してもエラーの通知は出ません。）

以上

私の方で試してみたところ、
手順の間に別の作業を挟んで1～5を連続で行わなくても発生しました。
キャッシュの消去では直りませんでした。
プロジェクトを開き直すと直りました。
Windows版cc2019（16.1.3）では起きませんでした。

ご確認よろしくお願い致します。

with the upgrade of the EXR workflow inside AE it is easyer than ever to do 3d compositing inside AE. But there is a lack of native tools to do so.
First of all the camera blur is slow, doesn't handle the aliased problems in the zdepth very well and doesn't produce a convincing photorealist blur...
Next the pixel motion blur was a great addition when it was promoted a few years ago but it would have been great to be able to feed it with a motion vector pass coming from the 3d render to be able to produce a nice motion blur.
There is no native relighting workflow inside AE you can't use your normal pass or your point position pass inside AE to do relighting or help merge your 3d passes and live footages.
For all those problems there are 3rd party solutions but all of the solutions 3rd parties came with are becoming old, are not well maintained and a bit clunky. And after effects and its users deserve better than those. We could use an other compositing package for those tasks but after effects have other capabilities that make it a for more flexible tool than its competitors

Enable Time Remapping doesn't seem to function properly when used with EXR sequences. I rendered a multi-pass EXR sequence from C4D and split it up using ProEXR from fnord. However, in order to save time, I only rendered the frames that had animation on them, figuring I could time remap it in AE to add handles to the beginning and end. Usually, the workflow is to move one frame back set a new key, delete the final time remap key and extend the ending layer. This doesn't work, everything afterwards just shows up black. As a workaround I've had to import stills and extend them to make the ending longer, which is a pain because it's a multi-pass render and there's several sequences. The reason why I believe this is an EXR related bug is because it seems to work fine with other sequences such as PNG and JPG. EXR is the industry standard compositing format, and AE is supposed to be an industry standard compositor. That said, it seems like it needs better EXR support.