1

What is this effect called? Is it film-grain? It kind of looks like but the grains are bigger. Thanks a lot in advance.

screenshot

2

This looks very much like monochrome Gaussian (as opposed to Uniform, which it's not) noise at a low opacity. If I were going to reproduce the effect, I'd do this:

  • Add the noise to a white layer in Multiply or Darken mode @ about 20% opacity above the object. (The example below is in Darken mode at 21%.)

  • Use Photoshop's Blend If function (in the Blending Options dialog) to allow the whitest parts of the underlying object to show through.

enter image description here

  • Scale up the noise layer. Scaling it up makes noise "grain" edges less sharp and gives that "blobby" look.

enter image description here

  • Glad to help. It was an interesting exercise, actually. :) – Alan Gilbertson Jun 9 '14 at 22:29
1

Film grain is a possible answer.

Another is noise:

noise screenshot

You might also try to look up dithering - it's usually associated with GIF compression but can be used in an artsy way.

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