Film grain effect

[ayeshamustafa]

The film grain special effect in ART is the best I have encountered. However, I’ve noticed that any blurring effect in the rest of the processing also blurs the grain. Would it be possible to change the order in which processing is applied, so that grain effect is applied at the end of the processing line?

In the ‘real world’, film grain wouldn’t be blurred by OOF areas, so making such a change would make this effect more realistic.

[agriggio (Alberto)]

Hi,
the grain effect is already applied at the end of the pipeline. What you are seeing is probably an optical illusion. It’s easy to check, just use the attached test image. E.g.:

test.tif (9.6 MB)

[apostel338 (HP)]

Concerning the optical illusion. From a thread about the same topic a while ago.

Film grain suggestion

Strange. Tested a handfull of photos, couldn’t reproduce it. Is it inconsistend from photo to photo, or does it sometimes happen and sometimes not on one single photo? If there are photos where it always happens, can you share the raw + arp file like Alberto requested? What I recognized is, on photos with a certain amount of ISO noise it can look like if the grain got blurred when the grain overlays the ISO noise that of course gets blurred by the effect.

Film grain suggestion

This is indeed a possible explanation. The best way to test this is to use a synthetic, noise-free image, to make sure you are not falling into some “perceptual trap”, so to say…