If your comp was shorter than 113 frames, open the Comp Settings dialog and change its duration. Which takes a bit of effort to learn compared to the plethora of turnkey particle. BlurryPixel notes on the tutorial: So here is my first tutorial on Blurrypixel using an often overlooked particle effect in After Effects, Particle Playground. Go to the last frame (at frame 113), press N to mark the end of the work area, then choose Composition > Trim Comp to Work Area. Check out the Creating Particle Effects with Particle Playground in After Effects Tutorial here. You can customize it with the following properties: sample-fill-color A color value. Sample Fill This layer will use a color map to show the wind speed at each pixel (interpolated from the data set). Here you can see the effect of the Opacity and Color Quick Maps. Layers This package offers several ways to visualize wind speed. AE will sequence each image for a single frame. Quick Maps allow you to easily manipulate the properties of your particles over a chosen axis. With all the layers still selected, right-click one, then choose Keyframe Assistants from the context menu, then choose Sequence Layers… Do not set an overlap just click Ok. Now all the images are one frame long, but still stacked on top of each other. Select all the layers and press Alt- to mark an out-point at the same location. Un-Precompose multiple pre-comps in a single run to allow you to work more efficiently Optionally attempt to correct. It sounds like you’ve positioned all the layers on top of each other. I tried to render as a movie and this somewhat works but the images show up as a square and overlap each other.” png with alpha)and my background in my after efects comp is black. The default output module “Lossless” doesn’t support alpha, but “Lossless with Alpha” does. Sure you can! You just have to use a codec that supports alpha (like Animation or PNG). “As far as i know you can’t use alpha in a movie?” I’d put all the images in a precomp and use that as the source for the layer map - no need to render an intermediate.
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