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-rw-r--r--man/blind-spiral-gradient.123
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diff --git a/man/blind-spiral-gradient.1 b/man/blind-spiral-gradient.1
index 954adcc..efd61f3 100644
--- a/man/blind-spiral-gradient.1
+++ b/man/blind-spiral-gradient.1
@@ -4,7 +4,8 @@ blind-spiral-gradient - Generate a video with a spiral gradient
.SH SYNOPSIS
.B blind-spiral-gradient
[-s
-.IR spirals ]
+.I spirals
+| -t]
[-al]
-w
.I width
@@ -112,11 +113,31 @@ distributed.
.I spirals
can be any non-zero real number.
.TP
+.B -t
+Base the resulting values only on the angle
+in the spiral formula rather than then both
+the angle and radius. This is useful for
+creating transitions with spiral effects.
+.TP
.BR -w " "\fIwidth\fP
The width of the video, in pixels.
.TP
.BR -h " "\fIheight\fP
The height of the video, in pixels.
+.SH NOTES
+Because
+.B -s
+has no affect when
+.B -t
+is applied,
+.B -s
+and
+.B -t
+cannot be combined unless
+.I spirals
+is 1. This will change in the future
+if a way to meaningfully combined the
+two flags is found.
.SH SEE ALSO
.BR blind (7),
.BR blind-from-text (7),