Paths these features keep in the document go through the same resolver as
linked smart objects (relative to the document's folder; other computers,
devices and URLs refused):
- A Displace smart filter's `mapPath` and a Color Lookup smart filter's LUT
`file`, re-read on every re-render: a path that is not followed leaves
the pixels as they are, as for a missing map or LUT.
- Apply Data Set's Pixel Replacement images.
- Reload Frame of a video layer's footage.
Apply Data Set and Reload Frame say why a path is not followed.