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Is ther a way to know which effect support Opengl?
I noticed that some effects slow down the preview when using opengl
but if you turn them off it speeds up
i noticed glow slows down alot
any idea how to know which effect support opengl and which one doesnt? this way if lets say i need a glow i might use alternative
thanx -
4 Replies
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Hello again Dotan,
In the Comp window, under the same menu you choose to enable OpenGL preferences choose Fast Preview Preferences. Click on OpenGL Info, this will show you what your card supports and doesn’t support.
Grant Swanson
Visual Effects Supervisor
Video Apex – Minneapolis, MN
videoapex.net -
Hi again
thats not what i meant
what i meant was how can i tell what effects in AE support Opengl
like glow is not supported and it slows down the preview -
The only way I’ve found to check this is by switching to the OpenGL (Always On) preview mode, applying Fractal Noise (an OpenGL accelerated effect) to a layer and then applying the effect you want to test on top of the fractal noise. If the rendering of the Fractal Noise changes after you apply the effect then that effect is not OpenGL accelerated. Adding a non-OpenGL accelerated effect breaks the OpenGL preview render pipeline so Fractal Noise has to render on the CPU, and it always renders differently on the CPU vs. GPU.
If, however, the Fractal Noise looks the same as it did before then you have an OpenGL accelerated effect.
Adobe provides this list of effects:
https://help.adobe.com/en_US/AfterEffects/9.0/WS3878526689cb91655866c1103a4f2dff7-79e8a.html
I should mention that some effects on the list that don’t always render using OpenGL. Any of the blurs as well as Glow and Drop Shadow will move from the GPU at a low radius to the CPU at an arbitrary radius. Drop Shadow, for example will render under OpenGL at a radius of 49 but switches to the CPU at 50.
I also have my own comprehensive list of these effects lying around somewhere on an external hard drive, if I can find it I’ll try and post it.
Darby Edelen
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Thanx guys for the help here
the reason i want to know which effect is supported by opengl is not that when im working on a project design it acording to what supported or not rather its to use render and preview faster so for instance lets say i want a quick wmv for a client to see the animation with 3d and lights i can do it fast using the opengl so to use it i need to switch off some of the effects and not all of them
p.s darby if you find that list please post it here
thanx again
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