Realistic Film Grain on iPhone: Overlay vs Simulation

Good grain should feel part of the photograph. A fixed noise layer can look pasted on; image-aware grain responds to the tones underneath.

Fixed overlay and Emulsine grain simulation — before — Illustrative overlay, matched in midtones; not output from a named app.

Fixed overlay and Emulsine grain simulation — developed with Emulsine — Illustrative overlay, matched in midtones; not output from a named app.

Why can a grain overlay look artificial?

A constant-strength texture treats a bright lamp and a shaded wall the same way. It can make highlights gritty and muddy the deepest shadows.

What does Emulsine do differently?

Emulsine generates grain with image-dependent strength and scales its texture for the output. Look at the lamp and the wall beside it: the grain stays more closely integrated with the photograph.

How do I get realistic grain?

Choose your film color first, then start with 35mm grain. Try 16mm for a bolder texture and check the developed image at the size you plan to share.