I have no clue at all. But when confronted with weird issues, I start by turning off layers in a binary test.Try turning off the underlying layer and render. If the flickering reminas, it's the filter layer. If the flickering goes away, it's caused by the media, not the filter.
If that doesn't lead to a solution, try recreating the comp. Make a copy of the comp, open it, delete the wipe layer, save. Now recreate the wipe layer.
You might also extend the shot, give yourself some handles before and after the in and out points, so the flickering happens after your critical content.
Not looking over you shoulder, I do not understand why you are using that particular filter to achieve your effect. A fade, either a ramp like a graduated black mask or a change in opacity, can be achieved many diffeernt way besides using a wipe. So try some of those
Thanks for your reply. I tried out your suggestions, lengthening the composition hasn't made a difference. It seems to be triggered by the shot moving upwards (and the layer moving downwards accordingly). When I rendered the layer by itself the wipe was gone altogether.
As to why I'm using it, it's for a sky replacement shot. I want the sky I've added to fade into the original sky so that it looks more natural. I'm somewhat new to AE, so if you could explain another way of achieving the same effect I'd be glad to try it out.
I concur with David - try to re-create the layer. This sounds rather odd. On the otehr hand, since you are using belnding modes combined with ttransparencies the issue may not relate to the wipe layer at all but rather how it interacts with a layer below, even more so since it moves. This may lead to random obscuration and in particular have ill effects on things like layer styles or anything applied via adjustment layers... I'd check that, too...
Thanks guys. I've tried recreating the layer and turning off the blending mode to simplify things, but annoyingly it still happens. I've found the only thing that gets rid of the issue is turning off the position keyframes so that the layer doesn't move. Unfortunately that isn't an option for me because it's a panning shot... Is there maybe another way I can achieve the effect?
Are you using OpenGL?
Are you using Render Multiple Frames Simultaneously multiprocessing?
What happens if you set the layer to Draft mode?
I am using OpenGL, yes.
The RMFS setting was switched off, and turning it on made no difference to the flickering. Nor did changing the layer quality to draft...
Just curious, have you tried doing a full render or have you only encountered this problem during RAM previews? I have gotten flickering issues in the past when I would bring in renders from Cinema 4D, but it would only occur during RAM previews. When I did a full render, it came out just fine. To fix the RAM preview flickering issues, I simply would Edit > Purge > All. Hope this helps.
> I am using OpenGL, yes.
Turn it off.
Still no change...
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Since nothing is working for you with linear wipe, try this:
Create a new shape layer (make sure that no layers in your timeline are selected, and double click the rectangle mask icon in your tool palette) that has a white-to-black gradient on it (by adjusting the fill in your tool palette), apply the multiply transfer mode, and use that instead of the linear wipe.
You can also create a new solid, apply a ramp effect to it (under Effect > Generate), apply your multiply transfer mode to it, and you'll also get the same exact effect
There are other methods too, but one of those two should do the trick.