As a takeaway, if you have a single animation, it’s okay to keep that in your main comp, however, if you’re using more than one, you should pre-comp the animation to improve your preview performance. Just having layers in one comp is very slow in comparison – over 40% slower. So as you can see, it’s a lot better if you Pre-Comp multiple animations. Would it be wise to pre-compose the animation and duplicate the pre-comp instead of having 6 different versions of it? Let’s take a look, here’s how that test turned out: Pre-Comped Animation 圆 So now the Main Composition with the Pre-Comps in it has 7 layers (the background plus the 6 animation pre-comps) and the Main Composition with just the animation layers in it has 19 layers (the background plus 3 layers for each separate apple animation).Īgain, to make this more understandable, let’s say you have your main composition with a whole bunch of layers in it, all creating six versions of the same animation in different places in the comp. We went ahead and did the same as we did in point 1 and tried putting six of the animations in the Main Composition. So at this stage, not using a Pre-Comp to render an animation is more beneficial than using one, but again, not by a big margin. You think to yourself, should I pre-compose some of these layers to make my preview run faster? Take a look below to answer that very question. So to make this more understandable, say you had your main 1920 x 1080 px composition, and you filled it with a whole bunch of layers all creating various animations. This time, we replaced the black circle with an image of an apple to text image rendering. Similarly to point 1, we had two 1920 x 1080 px Main Compositions, one for the Pre-Comped animation and one for the non-Pre-Comped animation. But what effect do they have on performance? Does your preview run faster when using pre-comps or when just using layers? We put this to the test too. They allow you to simplify your workflow and condense otherwise unwieldy projects. Pre-comps are a great feature in After Effects. Make sure you update the new Pre-Comp’s comp settings to reduce the resolution of it. ![]() ![]() Hot Tip: When creating a Pre-Comp from layers in the current composition, the new Pre-Comp will take the resolution value from the composition the layers were in. If your compositions are even bigger, and your projects have a lot more components, this is definitely something to consider when trying to get your preview speed down. Here are our results from that: 1920 x 1080 px Pre-Comp 圆 We took our same Pre-Comps and multiplied them by 6 in our Main Composition to see what would happen under a heavier load. Whilst this difference isn’t huge, it does scale with larger projects. Here are our findings: 1920 x 1080 px Pre-CompĪs you can see, the 500px Pre-Comp performed better during the preview. All previews were done at 100% zoom and Full resolution. We would then time how long it would take to preview each Main Composition (the 1920px and the 500px one). Each contained the same animated elements of equal resolution. We also had two Pre-Comps, one was 1920 x 1080 px, and the was 500 x 500 px. In the first, we had a 1920 x 1080 px Main Composition (60fps, 10s duration). ![]() Using your pre-comp this way is much more performance-intensive than using a 500 x 500 px composition size to house your animation or graphic. In that pre-comp is a small animation, or still graphic that only takes up a 500 x 500 px area, the rest has nothing in it (alpha). In your main comp, you have a pre-comp of the same 1920 x 1080 px resolution. To explain, say you have a Main Composition that is 1920 x 1080 px. We’ve put it to the test to prove that using pre-comps that are sized correctly are beneficial performance-wise when put up against full-res pre-comps. Pre-comp sizing is an important factor that is often overlooked when creating projects in After Effects. Ensure your pre-comps are only as big as they need to be Here’s a bullet-pointed list of how to make your project a bit lighter and less sluggish: 1. This combined with the use of effects and 3D camera work can seriously slow down your compositions and render times. One of the biggest causes of stutter and lag when using After Effects is having a lot of compositions and layers. Here at Grizzle, we’ve found a few workarounds and fixes to get your render previews back up to speed and fix a slow preview in After Effects. Even with a unit of a PC/Mac, things can run slow it takes no prisoners whether you’ve got 8GB or 64GB of RAM. ![]() After Effects, although a powerhouse of a program, does have its downfalls especially when it comes to previewing what you’ve produced in your various compositions and layers.
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