--- /dev/null
+#
+# $Id: pm3dgamma.dem,v 1.2 2003/10/17 15:02:21 mikulik Exp $
+#
+# Test of gamma correction for gray palettes
+
+set pm3d; set palette
+set palette gray
+set pm3d map
+set cbrange [-10:10]
+set xrange [-10:10]
+set yrange [*:*]
+unset ztics
+unset ytics
+set samples 101
+set isosamples 2
+set xtics 2
+
+set palette gamma 0.75
+set title "gamma = 0.75"
+splot x
+pause -1 "Hit return to continue"
+
+
+set palette gamma 1.0
+set title "gamma = 1.0"
+splot x
+pause -1 "Hit return to continue"
+
+
+set palette gamma 1.25
+set title "gamma = 1.25"
+splot x
+pause -1 "Hit return to continue"
+
+
+set palette gamma 1.5
+set title "gamma = 1.5"
+splot x
+pause -1 "Hit return to continue"
+
+
+set palette gamma 1.75
+set title "gamma = 1.75"
+splot x
+pause -1 "Hit return to continue"
+
+
+set palette gamma 2.0
+set title "gamma = 2.0"
+splot x
+pause -1 "Hit return to continue"
+
+reset
+