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Preview slow // Render fast

New Here ,
Jul 10, 2018 Jul 10, 2018

Hello !

I have a issue with my new PC and After Effect. I really don't know why.

I have a project with a very simple shape (a square), moving on my precomp (100x100 px). I put this precomp in an other comp and I dupplicate it a lot (100x). When I pre-render my project, it's very very slow... like if my PC isn't enought powerfull (it still a simple scene for this kind of computer !). But when I did real render, it's very fast (the render takes few seconds when the pre-render takes minutes).

Have you got an idea to fix that ?

My PC :

Intel Core i7-7700HQ CPU 2.80 GHZ

RAM 8GO

NVIDIA GTX 1070

Thanks !

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Engaged ,
Jul 10, 2018 Jul 10, 2018

Not much you can fix. Depending on some settings (motion blur for instance) and how long the scene is it might take a while to cache a preview. Once those frames are cached, however, the final render is just compiling those cached frames for the into a final export file. At that point, since you've already sat through the hard work of caching, the render would be super fast.

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New Here ,
Jul 10, 2018 Jul 10, 2018
LATEST

Hello and thank you for the answer.

But I think there is something to do because i didn't cached all the frame before the export ! Only some frames are cached, I have a lot of different compositions like this and for some of theme I didn't cached a single frame, but the export is still fast...

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