diff -Nru f3d-1.3.1+dfsg/debian/changelog f3d-1.3.1+dfsg/debian/changelog
--- f3d-1.3.1+dfsg/debian/changelog	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/changelog	2022-11-06 13:17:51.000000000 +0000
@@ -1,3 +1,18 @@
+f3d (1.3.1+dfsg-5) unstable; urgency=medium
+
+  * Update changelog to correct typo in the Assimp s390x bug number
+    #1023229 instead of #1023212 (Closes: #1023229)
+
+ -- Francois Mazen <francois@mzf.fr>  Sun, 06 Nov 2022 14:17:51 +0100
+
+f3d (1.3.1+dfsg-4) unstable; urgency=medium
+
+  * Improve logging of Assimp error.
+  * Do not use Assimp for s390x due to big endian issue
+  * Activate OpenCascade module and add relevant autopkgtest
+
+ -- Francois Mazen <francois@mzf.fr>  Mon, 31 Oct 2022 19:15:04 +0100
+
 f3d (1.3.1+dfsg-3) unstable; urgency=medium
 
   * Activate Assimp module and add relevant autopkgtest
diff -Nru f3d-1.3.1+dfsg/debian/control f3d-1.3.1+dfsg/debian/control
--- f3d-1.3.1+dfsg/debian/control	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/control	2022-11-06 10:33:28.000000000 +0000
@@ -4,9 +4,14 @@
 Maintainer: Francois Mazen <francois@mzf.fr>
 Build-Depends: debhelper-compat (= 13),
                cmake (>=3.1),
-               libassimp-dev,
+               libassimp-dev [!s390x],
+               libocct-data-exchange-dev,
+               libocct-draw-dev,
+               libocct-foundation-dev,
+               libocct-modeling-algorithms-dev,
                libvtk9-dev,
-               help2man
+               help2man,
+               occt-misc
 Standards-Version: 4.6.1.0
 Homepage: https://f3d-app.github.io/f3d/
 Vcs-Browser: https://salsa.debian.org/debian/f3d
diff -Nru f3d-1.3.1+dfsg/debian/patches/improve_assimp_error_output.patch f3d-1.3.1+dfsg/debian/patches/improve_assimp_error_output.patch
--- f3d-1.3.1+dfsg/debian/patches/improve_assimp_error_output.patch	1970-01-01 00:00:00.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/patches/improve_assimp_error_output.patch	2022-11-06 10:05:42.000000000 +0000
@@ -0,0 +1,16 @@
+Author: Francois Mazen <francois@mzf.fr>
+Description: improve error logging when Assimp fails to loas a file.
+Forwarded: not-needed
+
+--- a/library/VTKExtensions/Readers/vtkF3DAssimpImporter.cxx
++++ b/library/VTKExtensions/Readers/vtkF3DAssimpImporter.cxx
+@@ -581,6 +581,9 @@
+     else
+     {
+       vtkWarningWithObjectMacro(this->Parent, "Assimp failed to load: " << filePath);
++
++      auto errorDescription = this->Importer.GetErrorString();
++      vtkWarningWithObjectMacro(this->Parent, "Assimp error: " << errorDescription);
+     }
+   }
+ 
diff -Nru f3d-1.3.1+dfsg/debian/patches/series f3d-1.3.1+dfsg/debian/patches/series
--- f3d-1.3.1+dfsg/debian/patches/series	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/patches/series	2022-11-06 10:05:42.000000000 +0000
@@ -1,2 +1,3 @@
 fix_spelling_in_assimp_importer.patch
 fix_reproductibility.patch
+improve_assimp_error_output.patch
diff -Nru f3d-1.3.1+dfsg/debian/rules f3d-1.3.1+dfsg/debian/rules
--- f3d-1.3.1+dfsg/debian/rules	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/rules	2022-11-06 10:33:28.000000000 +0000
@@ -4,6 +4,13 @@
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
 
+DEB_HOST_ARCH ?= $(call vafilt,$(DPKG_VARS),DEB_HOST_ARCH)
+ifeq ($(DEB_HOST_ARCH),s390x)
+	USE_ASSIMP=OFF
+else
+	USE_ASSIMP=ON
+endif
+
 %:
 	dh $@
 
@@ -12,7 +19,8 @@
 	-DBUILD_TESTING:BOOL=OFF \
 	-DBUILD_SHARED_LIBS=OFF \
 	-DF3D_GENERATE_MAN=ON \
-	-DF3D_MODULE_ASSIMP=ON
+	-DF3D_MODULE_ASSIMP=$(USE_ASSIMP) \
+	-DF3D_MODULE_OCCT=ON
 
 override_dh_auto_install:
 	dh_auto_install
diff -Nru f3d-1.3.1+dfsg/debian/source/include-binaries f3d-1.3.1+dfsg/debian/source/include-binaries
--- f3d-1.3.1+dfsg/debian/source/include-binaries	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/source/include-binaries	2022-11-06 10:33:28.000000000 +0000
@@ -1,2 +1,3 @@
 debian/tests/cube_vtp_ref.png
 debian/tests/cube_dae_ref.png
+debian/tests/cube_step_ref.png
diff -Nru f3d-1.3.1+dfsg/debian/tests/check-cube-step f3d-1.3.1+dfsg/debian/tests/check-cube-step
--- f3d-1.3.1+dfsg/debian/tests/check-cube-step	1970-01-01 00:00:00.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/tests/check-cube-step	2022-11-06 10:33:28.000000000 +0000
@@ -0,0 +1,451 @@
+#!/bin/sh
+
+set -e
+
+CUBE_FILE_PATH=$AUTOPKGTEST_TMP/cube.step
+OUTPUT_PNG=$AUTOPKGTEST_ARTIFACTS/cube_step.png
+
+cat <<EOF > $CUBE_FILE_PATH
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('FreeCAD Model'),'2;1');
+FILE_NAME('Open CASCADE Shape Model','2022-10-09T23:40:48',('Author'),(
+    ''),'Open CASCADE STEP processor 7.5','FreeCAD','Unknown');
+FILE_SCHEMA(('AUTOMOTIVE_DESIGN { 1 0 10303 214 1 1 1 1 }'));
+ENDSEC;
+DATA;
+#1 = APPLICATION_PROTOCOL_DEFINITION('international standard',
+  'automotive_design',2000,#2);
+#2 = APPLICATION_CONTEXT(
+  'core data for automotive mechanical design processes');
+#3 = SHAPE_DEFINITION_REPRESENTATION(#4,#10);
+#4 = PRODUCT_DEFINITION_SHAPE('','',#5);
+#5 = PRODUCT_DEFINITION('design','',#6,#9);
+#6 = PRODUCT_DEFINITION_FORMATION('','',#7);
+#7 = PRODUCT('Cube','Cube','',(#8));
+#8 = PRODUCT_CONTEXT('',#2,'mechanical');
+#9 = PRODUCT_DEFINITION_CONTEXT('part definition',#2,'design');
+#10 = ADVANCED_BREP_SHAPE_REPRESENTATION('',(#11,#15),#345);
+#11 = AXIS2_PLACEMENT_3D('',#12,#13,#14);
+#12 = CARTESIAN_POINT('',(0.,0.,0.));
+#13 = DIRECTION('',(0.,0.,1.));
+#14 = DIRECTION('',(1.,0.,-0.));
+#15 = MANIFOLD_SOLID_BREP('',#16);
+#16 = CLOSED_SHELL('',(#17,#137,#237,#284,#331,#338));
+#17 = ADVANCED_FACE('',(#18),#32,.F.);
+#18 = FACE_BOUND('',#19,.F.);
+#19 = EDGE_LOOP('',(#20,#55,#83,#111));
+#20 = ORIENTED_EDGE('',*,*,#21,.F.);
+#21 = EDGE_CURVE('',#22,#24,#26,.T.);
+#22 = VERTEX_POINT('',#23);
+#23 = CARTESIAN_POINT('',(0.,0.,0.));
+#24 = VERTEX_POINT('',#25);
+#25 = CARTESIAN_POINT('',(0.,0.,10.));
+#26 = SURFACE_CURVE('',#27,(#31,#43),.PCURVE_S1.);
+#27 = LINE('',#28,#29);
+#28 = CARTESIAN_POINT('',(0.,0.,0.));
+#29 = VECTOR('',#30,1.);
+#30 = DIRECTION('',(0.,0.,1.));
+#31 = PCURVE('',#32,#37);
+#32 = PLANE('',#33);
+#33 = AXIS2_PLACEMENT_3D('',#34,#35,#36);
+#34 = CARTESIAN_POINT('',(0.,0.,0.));
+#35 = DIRECTION('',(1.,0.,-0.));
+#36 = DIRECTION('',(0.,0.,1.));
+#37 = DEFINITIONAL_REPRESENTATION('',(#38),#42);
+#38 = LINE('',#39,#40);
+#39 = CARTESIAN_POINT('',(0.,0.));
+#40 = VECTOR('',#41,1.);
+#41 = DIRECTION('',(1.,0.));
+#42 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#43 = PCURVE('',#44,#49);
+#44 = PLANE('',#45);
+#45 = AXIS2_PLACEMENT_3D('',#46,#47,#48);
+#46 = CARTESIAN_POINT('',(0.,0.,0.));
+#47 = DIRECTION('',(-0.,1.,0.));
+#48 = DIRECTION('',(0.,0.,1.));
+#49 = DEFINITIONAL_REPRESENTATION('',(#50),#54);
+#50 = LINE('',#51,#52);
+#51 = CARTESIAN_POINT('',(0.,0.));
+#52 = VECTOR('',#53,1.);
+#53 = DIRECTION('',(1.,0.));
+#54 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#55 = ORIENTED_EDGE('',*,*,#56,.T.);
+#56 = EDGE_CURVE('',#22,#57,#59,.T.);
+#57 = VERTEX_POINT('',#58);
+#58 = CARTESIAN_POINT('',(0.,10.,0.));
+#59 = SURFACE_CURVE('',#60,(#64,#71),.PCURVE_S1.);
+#60 = LINE('',#61,#62);
+#61 = CARTESIAN_POINT('',(0.,0.,0.));
+#62 = VECTOR('',#63,1.);
+#63 = DIRECTION('',(-0.,1.,0.));
+#64 = PCURVE('',#32,#65);
+#65 = DEFINITIONAL_REPRESENTATION('',(#66),#70);
+#66 = LINE('',#67,#68);
+#67 = CARTESIAN_POINT('',(0.,0.));
+#68 = VECTOR('',#69,1.);
+#69 = DIRECTION('',(0.,-1.));
+#70 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#71 = PCURVE('',#72,#77);
+#72 = PLANE('',#73);
+#73 = AXIS2_PLACEMENT_3D('',#74,#75,#76);
+#74 = CARTESIAN_POINT('',(0.,0.,0.));
+#75 = DIRECTION('',(0.,0.,1.));
+#76 = DIRECTION('',(1.,0.,-0.));
+#77 = DEFINITIONAL_REPRESENTATION('',(#78),#82);
+#78 = LINE('',#79,#80);
+#79 = CARTESIAN_POINT('',(0.,0.));
+#80 = VECTOR('',#81,1.);
+#81 = DIRECTION('',(0.,1.));
+#82 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#83 = ORIENTED_EDGE('',*,*,#84,.T.);
+#84 = EDGE_CURVE('',#57,#85,#87,.T.);
+#85 = VERTEX_POINT('',#86);
+#86 = CARTESIAN_POINT('',(0.,10.,10.));
+#87 = SURFACE_CURVE('',#88,(#92,#99),.PCURVE_S1.);
+#88 = LINE('',#89,#90);
+#89 = CARTESIAN_POINT('',(0.,10.,0.));
+#90 = VECTOR('',#91,1.);
+#91 = DIRECTION('',(0.,0.,1.));
+#92 = PCURVE('',#32,#93);
+#93 = DEFINITIONAL_REPRESENTATION('',(#94),#98);
+#94 = LINE('',#95,#96);
+#95 = CARTESIAN_POINT('',(0.,-10.));
+#96 = VECTOR('',#97,1.);
+#97 = DIRECTION('',(1.,0.));
+#98 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#99 = PCURVE('',#100,#105);
+#100 = PLANE('',#101);
+#101 = AXIS2_PLACEMENT_3D('',#102,#103,#104);
+#102 = CARTESIAN_POINT('',(0.,10.,0.));
+#103 = DIRECTION('',(-0.,1.,0.));
+#104 = DIRECTION('',(0.,0.,1.));
+#105 = DEFINITIONAL_REPRESENTATION('',(#106),#110);
+#106 = LINE('',#107,#108);
+#107 = CARTESIAN_POINT('',(0.,0.));
+#108 = VECTOR('',#109,1.);
+#109 = DIRECTION('',(1.,0.));
+#110 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#111 = ORIENTED_EDGE('',*,*,#112,.F.);
+#112 = EDGE_CURVE('',#24,#85,#113,.T.);
+#113 = SURFACE_CURVE('',#114,(#118,#125),.PCURVE_S1.);
+#114 = LINE('',#115,#116);
+#115 = CARTESIAN_POINT('',(0.,0.,10.));
+#116 = VECTOR('',#117,1.);
+#117 = DIRECTION('',(-0.,1.,0.));
+#118 = PCURVE('',#32,#119);
+#119 = DEFINITIONAL_REPRESENTATION('',(#120),#124);
+#120 = LINE('',#121,#122);
+#121 = CARTESIAN_POINT('',(10.,0.));
+#122 = VECTOR('',#123,1.);
+#123 = DIRECTION('',(0.,-1.));
+#124 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#125 = PCURVE('',#126,#131);
+#126 = PLANE('',#127);
+#127 = AXIS2_PLACEMENT_3D('',#128,#129,#130);
+#128 = CARTESIAN_POINT('',(0.,0.,10.));
+#129 = DIRECTION('',(0.,0.,1.));
+#130 = DIRECTION('',(1.,0.,-0.));
+#131 = DEFINITIONAL_REPRESENTATION('',(#132),#136);
+#132 = LINE('',#133,#134);
+#133 = CARTESIAN_POINT('',(0.,0.));
+#134 = VECTOR('',#135,1.);
+#135 = DIRECTION('',(0.,1.));
+#136 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#137 = ADVANCED_FACE('',(#138),#152,.T.);
+#138 = FACE_BOUND('',#139,.T.);
+#139 = EDGE_LOOP('',(#140,#170,#193,#216));
+#140 = ORIENTED_EDGE('',*,*,#141,.F.);
+#141 = EDGE_CURVE('',#142,#144,#146,.T.);
+#142 = VERTEX_POINT('',#143);
+#143 = CARTESIAN_POINT('',(10.,0.,0.));
+#144 = VERTEX_POINT('',#145);
+#145 = CARTESIAN_POINT('',(10.,0.,10.));
+#146 = SURFACE_CURVE('',#147,(#151,#163),.PCURVE_S1.);
+#147 = LINE('',#148,#149);
+#148 = CARTESIAN_POINT('',(10.,0.,0.));
+#149 = VECTOR('',#150,1.);
+#150 = DIRECTION('',(0.,0.,1.));
+#151 = PCURVE('',#152,#157);
+#152 = PLANE('',#153);
+#153 = AXIS2_PLACEMENT_3D('',#154,#155,#156);
+#154 = CARTESIAN_POINT('',(10.,0.,0.));
+#155 = DIRECTION('',(1.,0.,-0.));
+#156 = DIRECTION('',(0.,0.,1.));
+#157 = DEFINITIONAL_REPRESENTATION('',(#158),#162);
+#158 = LINE('',#159,#160);
+#159 = CARTESIAN_POINT('',(0.,0.));
+#160 = VECTOR('',#161,1.);
+#161 = DIRECTION('',(1.,0.));
+#162 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#163 = PCURVE('',#44,#164);
+#164 = DEFINITIONAL_REPRESENTATION('',(#165),#169);
+#165 = LINE('',#166,#167);
+#166 = CARTESIAN_POINT('',(0.,10.));
+#167 = VECTOR('',#168,1.);
+#168 = DIRECTION('',(1.,0.));
+#169 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#170 = ORIENTED_EDGE('',*,*,#171,.T.);
+#171 = EDGE_CURVE('',#142,#172,#174,.T.);
+#172 = VERTEX_POINT('',#173);
+#173 = CARTESIAN_POINT('',(10.,10.,0.));
+#174 = SURFACE_CURVE('',#175,(#179,#186),.PCURVE_S1.);
+#175 = LINE('',#176,#177);
+#176 = CARTESIAN_POINT('',(10.,0.,0.));
+#177 = VECTOR('',#178,1.);
+#178 = DIRECTION('',(-0.,1.,0.));
+#179 = PCURVE('',#152,#180);
+#180 = DEFINITIONAL_REPRESENTATION('',(#181),#185);
+#181 = LINE('',#182,#183);
+#182 = CARTESIAN_POINT('',(0.,0.));
+#183 = VECTOR('',#184,1.);
+#184 = DIRECTION('',(0.,-1.));
+#185 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#186 = PCURVE('',#72,#187);
+#187 = DEFINITIONAL_REPRESENTATION('',(#188),#192);
+#188 = LINE('',#189,#190);
+#189 = CARTESIAN_POINT('',(10.,0.));
+#190 = VECTOR('',#191,1.);
+#191 = DIRECTION('',(0.,1.));
+#192 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#193 = ORIENTED_EDGE('',*,*,#194,.T.);
+#194 = EDGE_CURVE('',#172,#195,#197,.T.);
+#195 = VERTEX_POINT('',#196);
+#196 = CARTESIAN_POINT('',(10.,10.,10.));
+#197 = SURFACE_CURVE('',#198,(#202,#209),.PCURVE_S1.);
+#198 = LINE('',#199,#200);
+#199 = CARTESIAN_POINT('',(10.,10.,0.));
+#200 = VECTOR('',#201,1.);
+#201 = DIRECTION('',(0.,0.,1.));
+#202 = PCURVE('',#152,#203);
+#203 = DEFINITIONAL_REPRESENTATION('',(#204),#208);
+#204 = LINE('',#205,#206);
+#205 = CARTESIAN_POINT('',(0.,-10.));
+#206 = VECTOR('',#207,1.);
+#207 = DIRECTION('',(1.,0.));
+#208 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#209 = PCURVE('',#100,#210);
+#210 = DEFINITIONAL_REPRESENTATION('',(#211),#215);
+#211 = LINE('',#212,#213);
+#212 = CARTESIAN_POINT('',(0.,10.));
+#213 = VECTOR('',#214,1.);
+#214 = DIRECTION('',(1.,0.));
+#215 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#216 = ORIENTED_EDGE('',*,*,#217,.F.);
+#217 = EDGE_CURVE('',#144,#195,#218,.T.);
+#218 = SURFACE_CURVE('',#219,(#223,#230),.PCURVE_S1.);
+#219 = LINE('',#220,#221);
+#220 = CARTESIAN_POINT('',(10.,0.,10.));
+#221 = VECTOR('',#222,1.);
+#222 = DIRECTION('',(-0.,1.,0.));
+#223 = PCURVE('',#152,#224);
+#224 = DEFINITIONAL_REPRESENTATION('',(#225),#229);
+#225 = LINE('',#226,#227);
+#226 = CARTESIAN_POINT('',(10.,0.));
+#227 = VECTOR('',#228,1.);
+#228 = DIRECTION('',(0.,-1.));
+#229 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#230 = PCURVE('',#126,#231);
+#231 = DEFINITIONAL_REPRESENTATION('',(#232),#236);
+#232 = LINE('',#233,#234);
+#233 = CARTESIAN_POINT('',(10.,0.));
+#234 = VECTOR('',#235,1.);
+#235 = DIRECTION('',(0.,1.));
+#236 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#237 = ADVANCED_FACE('',(#238),#44,.F.);
+#238 = FACE_BOUND('',#239,.F.);
+#239 = EDGE_LOOP('',(#240,#261,#262,#283));
+#240 = ORIENTED_EDGE('',*,*,#241,.F.);
+#241 = EDGE_CURVE('',#22,#142,#242,.T.);
+#242 = SURFACE_CURVE('',#243,(#247,#254),.PCURVE_S1.);
+#243 = LINE('',#244,#245);
+#244 = CARTESIAN_POINT('',(0.,0.,0.));
+#245 = VECTOR('',#246,1.);
+#246 = DIRECTION('',(1.,0.,-0.));
+#247 = PCURVE('',#44,#248);
+#248 = DEFINITIONAL_REPRESENTATION('',(#249),#253);
+#249 = LINE('',#250,#251);
+#250 = CARTESIAN_POINT('',(0.,0.));
+#251 = VECTOR('',#252,1.);
+#252 = DIRECTION('',(0.,1.));
+#253 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#254 = PCURVE('',#72,#255);
+#255 = DEFINITIONAL_REPRESENTATION('',(#256),#260);
+#256 = LINE('',#257,#258);
+#257 = CARTESIAN_POINT('',(0.,0.));
+#258 = VECTOR('',#259,1.);
+#259 = DIRECTION('',(1.,0.));
+#260 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#261 = ORIENTED_EDGE('',*,*,#21,.T.);
+#262 = ORIENTED_EDGE('',*,*,#263,.T.);
+#263 = EDGE_CURVE('',#24,#144,#264,.T.);
+#264 = SURFACE_CURVE('',#265,(#269,#276),.PCURVE_S1.);
+#265 = LINE('',#266,#267);
+#266 = CARTESIAN_POINT('',(0.,0.,10.));
+#267 = VECTOR('',#268,1.);
+#268 = DIRECTION('',(1.,0.,-0.));
+#269 = PCURVE('',#44,#270);
+#270 = DEFINITIONAL_REPRESENTATION('',(#271),#275);
+#271 = LINE('',#272,#273);
+#272 = CARTESIAN_POINT('',(10.,0.));
+#273 = VECTOR('',#274,1.);
+#274 = DIRECTION('',(0.,1.));
+#275 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#276 = PCURVE('',#126,#277);
+#277 = DEFINITIONAL_REPRESENTATION('',(#278),#282);
+#278 = LINE('',#279,#280);
+#279 = CARTESIAN_POINT('',(0.,0.));
+#280 = VECTOR('',#281,1.);
+#281 = DIRECTION('',(1.,0.));
+#282 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#283 = ORIENTED_EDGE('',*,*,#141,.F.);
+#284 = ADVANCED_FACE('',(#285),#100,.T.);
+#285 = FACE_BOUND('',#286,.T.);
+#286 = EDGE_LOOP('',(#287,#308,#309,#330));
+#287 = ORIENTED_EDGE('',*,*,#288,.F.);
+#288 = EDGE_CURVE('',#57,#172,#289,.T.);
+#289 = SURFACE_CURVE('',#290,(#294,#301),.PCURVE_S1.);
+#290 = LINE('',#291,#292);
+#291 = CARTESIAN_POINT('',(0.,10.,0.));
+#292 = VECTOR('',#293,1.);
+#293 = DIRECTION('',(1.,0.,-0.));
+#294 = PCURVE('',#100,#295);
+#295 = DEFINITIONAL_REPRESENTATION('',(#296),#300);
+#296 = LINE('',#297,#298);
+#297 = CARTESIAN_POINT('',(0.,0.));
+#298 = VECTOR('',#299,1.);
+#299 = DIRECTION('',(0.,1.));
+#300 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#301 = PCURVE('',#72,#302);
+#302 = DEFINITIONAL_REPRESENTATION('',(#303),#307);
+#303 = LINE('',#304,#305);
+#304 = CARTESIAN_POINT('',(0.,10.));
+#305 = VECTOR('',#306,1.);
+#306 = DIRECTION('',(1.,0.));
+#307 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#308 = ORIENTED_EDGE('',*,*,#84,.T.);
+#309 = ORIENTED_EDGE('',*,*,#310,.T.);
+#310 = EDGE_CURVE('',#85,#195,#311,.T.);
+#311 = SURFACE_CURVE('',#312,(#316,#323),.PCURVE_S1.);
+#312 = LINE('',#313,#314);
+#313 = CARTESIAN_POINT('',(0.,10.,10.));
+#314 = VECTOR('',#315,1.);
+#315 = DIRECTION('',(1.,0.,-0.));
+#316 = PCURVE('',#100,#317);
+#317 = DEFINITIONAL_REPRESENTATION('',(#318),#322);
+#318 = LINE('',#319,#320);
+#319 = CARTESIAN_POINT('',(10.,0.));
+#320 = VECTOR('',#321,1.);
+#321 = DIRECTION('',(0.,1.));
+#322 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#323 = PCURVE('',#126,#324);
+#324 = DEFINITIONAL_REPRESENTATION('',(#325),#329);
+#325 = LINE('',#326,#327);
+#326 = CARTESIAN_POINT('',(0.,10.));
+#327 = VECTOR('',#328,1.);
+#328 = DIRECTION('',(1.,0.));
+#329 = ( GEOMETRIC_REPRESENTATION_CONTEXT(2) 
+PARAMETRIC_REPRESENTATION_CONTEXT() REPRESENTATION_CONTEXT('2D SPACE',''
+  ) );
+#330 = ORIENTED_EDGE('',*,*,#194,.F.);
+#331 = ADVANCED_FACE('',(#332),#72,.F.);
+#332 = FACE_BOUND('',#333,.F.);
+#333 = EDGE_LOOP('',(#334,#335,#336,#337));
+#334 = ORIENTED_EDGE('',*,*,#56,.F.);
+#335 = ORIENTED_EDGE('',*,*,#241,.T.);
+#336 = ORIENTED_EDGE('',*,*,#171,.T.);
+#337 = ORIENTED_EDGE('',*,*,#288,.F.);
+#338 = ADVANCED_FACE('',(#339),#126,.T.);
+#339 = FACE_BOUND('',#340,.T.);
+#340 = EDGE_LOOP('',(#341,#342,#343,#344));
+#341 = ORIENTED_EDGE('',*,*,#112,.F.);
+#342 = ORIENTED_EDGE('',*,*,#263,.T.);
+#343 = ORIENTED_EDGE('',*,*,#217,.T.);
+#344 = ORIENTED_EDGE('',*,*,#310,.F.);
+#345 = ( GEOMETRIC_REPRESENTATION_CONTEXT(3) 
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#349)) GLOBAL_UNIT_ASSIGNED_CONTEXT
+((#346,#347,#348)) REPRESENTATION_CONTEXT('Context #1',
+  '3D Context with UNIT and UNCERTAINTY') );
+#346 = ( LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.) );
+#347 = ( NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.) );
+#348 = ( NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT() );
+#349 = UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-07),#346,
+  'distance_accuracy_value','confusion accuracy');
+#350 = PRODUCT_RELATED_PRODUCT_CATEGORY('part',$,(#7));
+#351 = MECHANICAL_DESIGN_GEOMETRIC_PRESENTATION_REPRESENTATION('',(#352)
+  ,#345);
+#352 = STYLED_ITEM('color',(#353),#15);
+#353 = PRESENTATION_STYLE_ASSIGNMENT((#354,#360));
+#354 = SURFACE_STYLE_USAGE(.BOTH.,#355);
+#355 = SURFACE_SIDE_STYLE('',(#356));
+#356 = SURFACE_STYLE_FILL_AREA(#357);
+#357 = FILL_AREA_STYLE('',(#358));
+#358 = FILL_AREA_STYLE_COLOUR('',#359);
+#359 = COLOUR_RGB('',0.906331759313,0.906331759313,0.906331759313);
+#360 = CURVE_STYLE('',#361,POSITIVE_LENGTH_MEASURE(0.1),#362);
+#361 = DRAUGHTING_PRE_DEFINED_CURVE_FONT('continuous');
+#362 = COLOUR_RGB('',0.345868924627,0.345868924627,0.345868924627);
+ENDSEC;
+END-ISO-10303-21;
+EOF
+
+echo ==========
+echo Smoke Test
+echo ==========
+f3d --no-render $CUBE_FILE_PATH
+
+echo ===========================
+echo Generate the new screenshot
+echo ===========================
+xvfb-run f3d -s --resolution=640,480 --output=$OUTPUT_PNG $CUBE_FILE_PATH
+
+echo ================
+echo Compare with ref
+echo ================
+idiff -v -failpercent 1 -warnpercent 1 debian/tests/cube_step_ref.png $OUTPUT_PNG
diff -Nru f3d-1.3.1+dfsg/debian/tests/control f3d-1.3.1+dfsg/debian/tests/control
--- f3d-1.3.1+dfsg/debian/tests/control	2022-10-09 17:19:31.000000000 +0000
+++ f3d-1.3.1+dfsg/debian/tests/control	2022-11-06 10:33:28.000000000 +0000
@@ -6,5 +6,9 @@
 Depends: f3d
 Restrictions: superficial
 
-Tests: check-cube-vtp, check-cube-dae
+Tests: check-cube-vtp, check-cube-step
 Depends: f3d, xvfb, xauth, openimageio-tools
+
+Tests: check-cube-dae
+Depends: f3d, xvfb, xauth, openimageio-tools
+Architecture: !s390x
Binary files /tmp/tmpa5gevy2k/uzlYQxHI3X/f3d-1.3.1+dfsg/debian/tests/cube_step_ref.png and /tmp/tmpa5gevy2k/Sz5uxwf43K/f3d-1.3.1+dfsg/debian/tests/cube_step_ref.png differ