After Effects rendering doesn't have to take forever. These optimizations can cut render times by 40-60% on the same hardware.
1. Enable Multi-Frame Rendering
Edit > Preferences > Memory & Performance > Enable Multi-Frame Rendering. This uses multiple CPU cores simultaneously. Allocate 75% of RAM to After Effects, leave 25% for OS and other apps.
2. Use GPU-Accelerated Effects
Effects with the GPU badge render on your graphics card instead of CPU. Replace CPU-only effects with GPU alternatives when possible. Check Edit > Preferences > Previews > GPU Information to verify your GPU is recognized.
3. Pre-Render Heavy Compositions
If a complex precomp takes 30 seconds per frame, pre-render it to ProRes/DNxHR. Replace the precomp with the rendered file. The rest of your project renders at full speed without re-processing that section.
4. Proxy Everything
Set proxies for all 4K+ footage: right-click > Create Proxy > Movie. Edit with lightweight files, render with originals.
5. Reduce Unnecessary Resolution
Set your comp to Half or Third resolution while working. Only switch to Full for final preview and render.
6. Purge Before Rendering
Edit > Purge > All Memory & Disk Cache. Frees up RAM for the render process.
7. Minimize Expressions
Complex expressions evaluate every frame. Bake expressions to keyframes (Animation > Keyframe Assistant > Convert Expression to Keyframes) before final render if the animation is locked.
8. Close Everything Else
Chrome, Slack, Spotify — they all compete for RAM and CPU. Close them during renders.