Correct the with_face_dpe note

README.md

@@ -82,12 +82,13 @@ Three things fail quietly rather than loudly, so they are worth stating plainly:
 2. **Give every capture its own `dataset.cache_dir`.** Decoded frames are named
    `cam%02d/%08d.jpg` with no capture in the path, so a shared cache would serve P1C1's
    frame 110 for P1C2's frame 110.
-3. **For `P1_dpe`, override `dataset.with_face_dpe`** to the session you are driving with
-   (`DREAMS-AVATAR/data/P1C2/dpe/dpe-multi-faces.zip`). The stored config points at the
-   *training* session's codes.
+3. **For `P1_dpe`, `dataset.with_face_dpe` must point at the session you are driving
+   with**, not the one it was trained on. These avatars store it as the *relative* value
+   `dpe`, and the loader resolves relative paths against `dat_dir`, so they follow
+   `--dat_dir` on their own. A config saved by your own training run holds an absolute path
+   to the training session's codes instead, and there you must override it.
 
-For `P1_dpe`, swap the face config to `configs/dreams/p1_face_A_dpe.yaml` and add that
-override.
+For `P1_dpe`, swap the face config to `configs/dreams/p1_face_A_dpe.yaml`.
 
 ## Training setup