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-rw-r--r--docs/config.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/config.md b/docs/config.md
index 1af696be..349814a6 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -554,7 +554,9 @@ keeps the last good one and says why), and
GUI attached to a detached session runs the session's chain the same way. With
the chain empty the pass is bypassed. CRT works in linear light with restrained
scanlines, mask, bloom and vignette, and no curvature, so clicks land where
-they are drawn.
+they are drawn. Its slow hum and dither move on their own, so with Crt on the
+GUI keeps drawing while idle (under `ShaderAnimation on`, while focused);
+the other bundled passes are still and let it rest.
Three more bundled passes take the same levels, each off by default and
each costing nothing while off: