diff --git a/Examples/Scripts/Python/full_chain_test.py b/Examples/Scripts/Python/full_chain_test.py
index 595dbd43a4e..1c839f31b3a 100755
--- a/Examples/Scripts/Python/full_chain_test.py
+++ b/Examples/Scripts/Python/full_chain_test.py
@@ -81,7 +81,12 @@ def parse_args():
         "--output-csv",
         action="count",
         default=0,
-        help="Use CSV output instead of ROOT. Specify -cc to output both.",
+        help="Use CSV output instead of ROOT. Specify -cc to output all formats (ROOT, CSV, and obj).",
+    )
+    parser.add_argument(
+        "--output-obj",
+        action="store_true",
+        help="Enable obj output",
     )
     parser.add_argument(
         "-n",
@@ -272,6 +277,7 @@ def full_chain(args):
     outputDirCsv = outputDir if args.output_csv != 0 else None
     outputDirLessCsv = outputDirLess if args.output_csv != 0 else None
     outputDirMoreCsv = outputDirMore if args.output_csv != 0 else None
+    outputDirObj = outputDirLess if args.output_obj else outputDir if args.output_csv == 2 else None
 
     # fmt: off
     if args.generic_detector:
@@ -388,8 +394,7 @@ def full_chain(args):
                 "LongStripEndcapReadout",
             ],
             outputParticlesGenerator="particles_input",
-            outputParticlesInitial="particles_initial",
-            outputParticlesFinal="particles_final",
+            outputParticlesSimulation="particles_simulated",
             outputSimHits="simhits",
             graphvizOutput="graphviz",
             dd4hepDetector=detector,
@@ -479,6 +484,7 @@ def full_chain(args):
                 postSelectParticles=postSelectParticles,
                 outputDirRoot=outputDirRoot,
                 outputDirCsv=outputDirCsv,
+                outputDirObj=outputDirObj,
             )
         else:
             if s.config.numThreads != 1:
@@ -504,6 +510,7 @@ def full_chain(args):
                 killAfterTime=25 * u.ns,
                 outputDirRoot=outputDirRoot,
                 outputDirCsv=outputDirCsv,
+                outputDirObj=outputDirObj,
             )
 
     addDigitization(