All the following pertain to Write Images nodes with “Write back to original images” checked:
- If you don’t specify an output folder, the node is skipped entirely and the input is sent directly to output
- If you do specify an output folder and the input is from a recursive Read Folder node, the input folder’s subfolder structure is duplicated in the output folder. So you end up with a bunch of empty folders in the output path that match the structure of the input path.
- If you have an “Open In App” node after the Write Images node, it doesn’t work.