Best way to create realistic explosions in After Effects (no plugins)?

Yeah, CC Particle World is not great for that. The key to realistic explosions is layering multiple elements: a bright core, a fireball, smoke, and debris. Start with a 32-bit project (set in Project Settings) to avoid banding in gradients. For the core, use a solid white layer with a fast radial blur and add a 'Glow' effect (set to 'Add' blending). For the fireball, create a shape layer with an ellipse, apply 'Fractal Noise' with a 'Turbulent' type, set the scale to 200, and animate the evolution over time. Then use 'CC Radial Blur' with a 'Zoom' mode to push the edges outward. For smoke, duplicate the fireball layer, change the color to dark gray, reduce opacity, and add a 'Displacement Map' with a fractal noise layer as the map to make it wispy. Finally, add a 'Camera Lens Blur' to the whole comp to soften it and a 'Curves' adjustment to boost contrast. This method works without plugins, trust me.

One thing that helps a lot is using stock footage as a base, even if you want to build your own. You can use a free stock explosion clip (like from Pexels) and then enhance it with After Effects effects. For example, take the clip and add a 'Color Correction' with 'Levels' to crank up the contrast, then duplicate it and set the top layer to 'Screen' blending to brighten the core. Add a 'Turbulent Displace' with a medium amount to distort the edges so it doesn't look like a clean stock shot. Also, use a 'Matte' with a 'Ramp' to fade the explosion into the background. For the color space, definitely use 32-bit float (linear) for the best blending, but remember to apply 'Tone Mapping' via the 'Exposure' effect if you're working with HDR. And don't forget to pre-render your explosion comp with 'Lossless' settings and import it back to avoid performance issues.

I'd also recommend checking out Video Copilot's free 'Saber' plugin, but if you want pure native, you can simulate a shockwave with a 'Circle' shape layer, add 'Stroke' with a thick width, animate the scale from 0 to 100, and add 'CC Light Burst' for that energy ring. For the fireball, a trick is to use 'Particle Playground' (it's old but works) with a custom particle like a small solid, and set the velocity to burst outward. Then apply 'Echo' with a decay to create trails. For realism, add some 'Grain' (like 'Noise' effect) to break up the smooth gradients. Also, use 'Trapcode Particular' if you ever get the budget, but for now, this works.

I've done this without plugins too. The most important thing is to study real explosion footage frame by frame. Notice that the fireball starts as a bright white sphere, then becomes orange, and then red as it cools. So animate the color of your fireball layer using keyframes: start at white, then to yellow, then orange, then dark red, and finally to black as it fades. Use 'Curves' to adjust the RGB channels separately. Also, add a 'Ramp' effect to the smoke layers to give them a gradient from black at the bottom to gray at the top. For the debris, you can use 'CC Particle World' but set the particle type to 'Cubic' and animate the velocity to shoot outward, then add 'Gravity' to make them fall. And always use 'Motion Blur' on the comp (enable the 'Motion Blur' button) to make it look more natural.

Thanks for all the great tips, everyone! I tried the layering approach with Fractal Noise and it worked much better. I also used the 32-bit color space and added a 'Camera Lens Blur' with a 'Curves' adjustment, and it looks a lot more realistic. I also watched some real explosion footage as suggested and animated the color like that. The shockwave trick with the Circle and CC Light Burst was a nice touch. I'll post the final result in the forum soon. Thanks again!