If checked, a Gaussian blur will be applied to the image, making it less clear.
Sepia
If checked, the filter reproduces the effect of aging in old, traditional black-and-white photographs, toned with sepia (shades of brown).[13] To achieve this effect, the filter desaturates the image, reduces brightness and contrast, and modifies the color balance.[14]
Example for the „Mottle“ option
Flatten image
[11] See Wikipedia [WKPD-SEPIA].
[12] Compare 8.2 – „Color Balance“.
[13] See Wikipedia [WKPD-SEPIA].
[14] Compare 8.2 – „Color Balance“.