diff --git a/README.md b/README.md
index e672d09..50d124c 100644
--- a/README.md
+++ b/README.md
@@ -49,12 +49,23 @@ udid=$(xcrun simctl list devices available | grep -Eo '[0-9A-Fa-f-]{36}' | head
 xcrun simctl boot "$udid" || true
 open -a Simulator
 
-# Install, launch (bundle id co.swipelab.m3te), and screenshot:
+# Install, launch (bundle id co.swipelab.m3te), wait for the board to render, then
+# screenshot. The wait is REQUIRED: screenshotting immediately after `launch` grabs
+# the blank white launch screen, before the scene has drawn. ~2 s is ample; poll the
+# screenshot if you want it tighter.
 xcrun simctl install booted sx-out/ios/M3te.app
 xcrun simctl launch booted co.swipelab.m3te
+sleep 2
 xcrun simctl io booted screenshot /tmp/m3te.png
 ```
 
+> **Render-readiness wait — applies to every sim capture recipe in this README.**
+> Each deterministic section below shows only the pinned `launch` command (it swaps a
+> different scene in for the `launch` line above); capture it exactly as here — after
+> the launch, **wait for the first rendered frame** (`sleep 2`, or poll the
+> screenshot) **before** `xcrun simctl io booted screenshot`. Skipping the wait
+> captures the white launch screen, not the board.
+
 The screenshot should match `goldens/p6_idle_t0.png` (the resting candy board),
 modulo the status-bar clock — pixel-exact equality is not required; compare the
 board + HUD region, not the top status strip. A tap selects a cell; a swipe