Filter › Dither, as Compositor 1.3.3 (12.15)

docs/writing-comp-files.md

@@ -89,7 +89,7 @@ Remove images you no longer reference once the manifest no longer lists them.
 - A reload keeps the zoom, scroll and selection, but clears undo, as reopening a file does.
 - If the person has unsaved changes of their own, OmaPhoto asks them to revert to your version or keep theirs, and never replaces their work silently.
 - A write that fails to load is ignored until the next change, so a mistake you then fix will still show up.
-- Changes are noticed from the manifest's contents and from each image's name and size. Rewriting a PNG with different pixels changes its size in practice, but if you replace an image with one of exactly the same byte size, also change the manifest's bytes (any valid change will do, even added whitespace): rewriting identical bytes is not noticed.
+- Changes are noticed from the manifest's contents and from each image's name and size, not from when files were written. Rewriting a PNG with different pixels changes its size in practice. If you replace an image with one of exactly the same byte size, also make a change to the manifest, such as renaming the layer (any change to its bytes will do, even added whitespace); writing identical manifest bytes back isn't enough.
 - Replacing the whole project folder at once is noticed too. A populated folder cannot be renamed over another on Linux; exchange the two instead with `renameat2(RENAME_EXCHANGE)` (Python's `os.rename` cannot), then remove the old one.
 
 ## Masks