Here’s a concise write-up on the in Adobe After Effects, including what it is, why it’s useful, and how to use it. What Is Deep Glow? Deep Glow is a popular third-party plugin (from Plugin Everything ) that creates high-quality, realistic glow effects. Unlike After Effects’ native Glow effect, Deep Glow produces smoother falloffs, less banding, and more control over glow shape, intensity, and color.