diff --git a/tools/bake_atlas.py b/tools/bake_atlas.py
index 4f8a760..817d020 100644
--- a/tools/bake_atlas.py
+++ b/tools/bake_atlas.py
@@ -14,7 +14,7 @@ trigger words (they summon player hands), a fixed style-anchor block, and a FIXE
 seed across every frame so the palette + lighting stay coherent across the atlas.
 
   python3 tools/bake_atlas.py --seed 7 [--url http://192.168.1.26:8188]
-                              [--strength 0.65] [--size 640x360] [--limit N]
+                              [--strength 0.70] [--size 640x360] [--limit N]
 """
 import argparse
 import glob
@@ -110,7 +110,10 @@ def main():
     ap = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
     ap.add_argument("--seed", type=int, required=True, help="dungeon seed (selects the atlas dir)")
     ap.add_argument("--url", default="http://192.168.1.26:8188")
-    ap.add_argument("--strength", type=float, default=0.85, help="depth control strength (0.85 honors the room footprint)")
+    ap.add_argument("--strength", type=float, default=0.70, help="depth control strength. 0.70 is the sweet spot now "
+                    "that rev-3 maps are full-contrast: a GPU A/B showed 0.85 over-constrained the bright near-ceiling "
+                    "into a blown-white band (worst on crypt frames, ~28%% of pixels), while 0.70 renders a natural "
+                    "dark vaulted ceiling AND still honors geometry — closed walls stay solid (no phantom doors return).")
     ap.add_argument("--render-seed", type=int, default=7, help="FIXED diffusion seed for every frame (style lock)")
     ap.add_argument("--size", default="640x360", help="pixel-art frame size (16:9; 320x180 for chunky)")
     ap.add_argument("--width", type=int, default=1280)