Why it's so difficult to simulate realistic film grain in digital photos.
Why Adding ‘Film Grain’ to Digital Photos is Trickier Than You May ThinkFor months now I’ve been obsessed with emulating the film look with my digital photos. It all started with me exploring the panoramic aspect ratio of 65×24 and other wide aspect ratios, trying to understand what makes a photo cinematic.
Regardless of the method, you pick for lowering the sharpness, you are aiming to have small details of the image as thin as the grain particles. Basically to goal is to have the pixels match the size of the grain.Another very important is the fact that the film grain is made out of organic particles. That means not all the grain particles have the same size and they are unevenly in the emulsion. This is the most significant distinction between grain and noise.
This matters because if you just take a grey overlay and blend it with Soft Light or Overlay blending mode on top of your photo, you will end up with perfectly clean areas near the ends of the spectrum. There are an infinite number of ways to add grain, and with the current resurgence of the film look, I’m sure many more will pop up as well. And at the moment some of the most believable results seem to come from phone apps or plugins, but this poses two problems for me and my workflow.
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