initial version of random angle strokes

README.md

@@ -227,11 +227,11 @@ blender -b sensors/finger/r01/source/geometry.blend -P blender/scripts/random_pa
   --vector-width-mm 164 --vector-height-mm 160
 ```
 
-Only the colored "patches" mode is reachable headlessly; the checker and dot
-helpers remain in `random_patch_dd02c.py` but are not exposed by the CLI. The
-default 3280×3200 grid matches the in-app script and is deliberately slow
-(pure-Python rasterization) — use smaller `--width/--height/--nx/--ny` for quick
-check runs, and the full default grid for the textures you actually ship.
+`binary-preview` derives PNG-only tracking trials from the existing color job
+in a separate directory; `--views` selects the multiview job. Stroke width
+follows camera-cell print size, bounded to 0.11–0.28 mm. These image-space
+trials are for probe comparisons, not print masters; UV views may select
+different cells. See `binary-preview --help` for paths and sizing controls.
 
 ## Inspect printability (advisory)