Layer Masking

Layer masking is the traditional editor's way of controlling what's visible in a composite: instead of erasing pixels permanently, you paint on a grayscale mask where white reveals the layer and black hides it, so any edit is fully reversible. It's the foundation of professional retouching — isolating a subject, blending a sky replacement, or hiding an object behind a new background. The trade-off is effort: a clean layer mask around hair, glass, or motion blur can take many minutes of manual brushwork and refinement. AI object removal collapses that workflow — Magic Eraser generates the equivalent of a precise mask plus a reconstructed background in one tap, so you get the non-destructive intent (the original is untouched; you export a new image) without hand-painting the mask. Understanding layer masking explains why AI removal feels like magic: it automates the most labor-intensive step of classic compositing. For edits that still need pixel-perfect manual control, layer masking in a full editor remains the precise option; for fast, clean removals at scale, AI is the practical choice.