diff --git a/Makefile b/Makefile
index b7c6639..bff5db6 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,9 @@ PNG:	essai.png scene.png topview.png passage.png	\
 topview.png:		topview.pov Makefile $(POVDEP)
 	povray $(POVOPT) $(DIMS) -K$(CK) -i$< -o$@
 
+cutoff.png:		cutoff.pov Makefile $(POVDEP)
+	povray $(POVOPT) $(DIMS) -K$(CK) -i$< -o$@
+
 essai.png:		essai.pov Makefile $(POVDEP)
 	povray $(POVOPT) $(DIMS) -K$(CK) -i$< -o$@
 
diff --git a/contexte.inc b/contexte.inc
index 2c074c2..1ba883a 100644
--- a/contexte.inc
+++ b/contexte.inc
@@ -156,10 +156,39 @@ texture {
 #declare Repere = object
 {
 union	{
-	cylinder { 0, <1, 0, 0>, 0.008 pigment { color Red } }
-	cylinder { 0, <0, 0, 1>, 0.008 pigment { color Blue } }
+	#local R = 0.008;
+	cylinder { 0, <1, 0, 0>, R pigment { color Red   } }
+	cylinder { 0, <0, 1, 0>, R pigment { color Green } }
+	cylinder { 0, <0, 0, 1>, R pigment { color Blue  } }
 	}
 }
+
+#declare OpenBox = object
+{
+union	{
+	#local R = 0.010;
+	/* les verticales */
+	cylinder { <-1, -1, -1>, <-1,  1, -1>, R }
+	cylinder { < 1, -1, -1>, < 1,  1, -1>, R }
+	cylinder { <-1, -1,  1>, <-1,  1,  1>, R }
+	cylinder { < 1, -1,  1>, < 1,  1,  1>, R }
+	/*   en bas */
+	cylinder { < 1, -1,  1>, <-1, -1,  1>, R }
+	cylinder { < 1, -1, -1>, <-1, -1, -1>, R }
+	cylinder { <-1, -1,  1>, <-1, -1, -1>, R }
+	cylinder { < 1, -1,  1>, < 1, -1, -1>, R }
+
+	/*   en haut */
+	cylinder { < 1,  1,  1>, <-1,  1,  1>, R }
+	cylinder { < 1,  1, -1>, <-1,  1, -1>, R }
+	cylinder { <-1,  1,  1>, <-1,  1, -1>, R }
+	cylinder { < 1,  1,  1>, < 1,  1, -1>, R }
+
+	#undef R
+	texture { WIP_color }
+	}
+}
+
 // =======================================================
 
 #declare Les_Lumieres = object
diff --git a/cutoff.pov b/cutoff.pov
new file mode 100644
index 0000000..b2fff69
--- /dev/null
+++ b/cutoff.pov
@@ -0,0 +1,42 @@
+/*
+ *	H E X A C O N E   -   C U T O F F
+ *   nouveau projet du Thu Dec  5 11:37:05 AM UTC 2024
+ */
+
+#version 3.7;
+
+#include  "globals.inc"
+
+#include  "contexte.inc"
+#include  "elements.inc"
+#include  "hexabenz.inc"
+
+// =======================================================
+
+#debug concat("------ cutoff clock = ", str(clock,5,0),"\n")
+
+#declare Kbox = (2*NormClock);
+
+/* this one is for debugging */
+object { OpenBox translate <0, 1.5, Kbox>  }
+
+difference {
+	object { HexaCone () rotate y*5 }
+	box { -1, 1  translate z*Kbox }
+	translate y*1.5
+	} 
+
+// =======================================================
+
+object { Le_Decor }
+object { Repere }
+
+// =======================================================
+
+#local CamX = -2.7 + (2.1*NormClock);
+#local CamY = 2.58  + (0.034*sqrt(NormClock));
+camera	{
+	location	<CamX, CamY, 6.99>
+	look_at		<0, 1.3, 0>
+	angle		42 - 4*Cos_01(NormClock)
+	}