diff --git a/sbndcode/CMakeLists.txt b/sbndcode/CMakeLists.txt
index 7712f07cd..2827cd1af 100755
--- a/sbndcode/CMakeLists.txt
+++ b/sbndcode/CMakeLists.txt
@@ -16,6 +16,7 @@ add_subdirectory(OpDetSim)
 add_subdirectory(OpDetReco)
 add_subdirectory(OpDetAnalyzer)
 add_subdirectory(OpT0Finder)
+add_subdirectory(OpPathTool)
 #add_subdirectory(PDS)
 #add_subdirectory(CosmicId)
 add_subdirectory(ShowerAna)
diff --git a/sbndcode/LArSoftConfigurations/PDFastSim_sbnd.fcl b/sbndcode/LArSoftConfigurations/PDFastSim_sbnd.fcl
index d9a85121c..9a29cdf9f 100644
--- a/sbndcode/LArSoftConfigurations/PDFastSim_sbnd.fcl
+++ b/sbndcode/LArSoftConfigurations/PDFastSim_sbnd.fcl
@@ -2,6 +2,7 @@
 #include "PDFastSimPVS.fcl"
 
 #include "opticalsimparameterisations_sbnd.fcl"
+#include "sbndopticalpath_tool.fcl"
 
 BEGIN_PROLOG
 
@@ -19,6 +20,8 @@ sbnd_pdfastsim_par.SimulationLabel:     "ionandscint:priorSCE"
 # independently for the TPB-delay time and the emission (fast and slow) decay times.
 sbnd_pdfastsim_par.ScintTimeTool.SlowDecayTime: 1300.0
 
+sbnd_pdfastsim_par.OpticalPathTool:     @local::SBNDOpticalPath
+
 # Direct (VUV)
 sbnd_pdfastsim_par.VUVTiming:           @local::sbnd_vuv_timing_parameterization
 sbnd_pdfastsim_par.VUVHits:             @local::sbnd_vuv_RS100cm_hits_parameterization
diff --git a/sbndcode/OpPathTool/CMakeLists.txt b/sbndcode/OpPathTool/CMakeLists.txt
new file mode 100644
index 000000000..24d09a42c
--- /dev/null
+++ b/sbndcode/OpPathTool/CMakeLists.txt
@@ -0,0 +1,11 @@
+include (phot::OpticalPath)
+
+cet_build_plugin(SBNDOpticalPath phot::OpticalPath
+  LIBRARIES PRIVATE
+  larsim::OpticalPath
+  larcoreobj::geo_vectors
+)
+
+install_headers()
+install_fhicl()
+install_source()
\ No newline at end of file
diff --git a/sbndcode/OpPathTool/SBNDOpticalPath.h b/sbndcode/OpPathTool/SBNDOpticalPath.h
new file mode 100644
index 000000000..8a077946d
--- /dev/null
+++ b/sbndcode/OpPathTool/SBNDOpticalPath.h
@@ -0,0 +1,27 @@
+// SBND optical path tool
+
+#ifndef SBNDOpticalPath_H
+#define SBNDOpticalPath_H
+
+#include "art/Utilities/ToolMacros.h" 
+#include "larsim/PhotonPropagation/OpticalPathTools/OpticalPath.h"
+#include "larcoreobj/SimpleTypesAndConstants/geo_vectors.h"
+
+#include <iostream>
+
+namespace phot {
+    class SBNDOpticalPath : public phot::OpticalPath {
+    public:
+        explicit SBNDOpticalPath(fhicl::ParameterSet const& ps) {};
+        ~SBNDOpticalPath() noexcept override = default;
+
+        const bool isOpDetVisible(geo::Point_t const& ScintPoint, geo::Point_t const& OpDetPoint) override {           
+            // special case for SBND 
+            // check x coordinate has same sign
+            if ((ScintPoint.X() < 0.) != (OpDetPoint.X() < 0.)) return false;            
+            else return true; 
+        }
+    };
+}
+
+#endif
diff --git a/sbndcode/OpPathTool/SBNDOpticalPath_tool.cc b/sbndcode/OpPathTool/SBNDOpticalPath_tool.cc
new file mode 100644
index 000000000..65686cf93
--- /dev/null
+++ b/sbndcode/OpPathTool/SBNDOpticalPath_tool.cc
@@ -0,0 +1,4 @@
+#include "sbndcode/OpPathTool/SBNDOpticalPath.h"
+#include "art/Utilities/ToolMacros.h"
+
+DEFINE_ART_CLASS_TOOL(phot::SBNDOpticalPath)
\ No newline at end of file
diff --git a/sbndcode/OpPathTool/sbndopticalpath_tool.fcl b/sbndcode/OpPathTool/sbndopticalpath_tool.fcl
new file mode 100644
index 000000000..950eda427
--- /dev/null
+++ b/sbndcode/OpPathTool/sbndopticalpath_tool.fcl
@@ -0,0 +1,10 @@
+// sbnd optical path tools
+
+BEGIN_PROLOG
+
+SBNDOpticalPath:
+{
+    tool_type: SBNDOpticalPath
+}
+
+END_PROLOG
\ No newline at end of file
diff --git a/sbndcode/OpT0Finder/CMakeLists.txt b/sbndcode/OpT0Finder/CMakeLists.txt
index f0790cc88..a3edf3f6b 100644
--- a/sbndcode/OpT0Finder/CMakeLists.txt
+++ b/sbndcode/OpT0Finder/CMakeLists.txt
@@ -12,6 +12,7 @@ set(
         lardataobj::AnalysisBase
         lardataobj::RecoBase
         larsim::Simulation
+	larsim::OpticalPath
         lardataobj::Simulation
         larpandora::LArPandoraInterface
         nusimdata::SimulationBase
diff --git a/sbndcode/OpT0Finder/SBNDOpT0Finder_module.cc b/sbndcode/OpT0Finder/SBNDOpT0Finder_module.cc
index 786e3b59d..c14b5cf4d 100644
--- a/sbndcode/OpT0Finder/SBNDOpT0Finder_module.cc
+++ b/sbndcode/OpT0Finder/SBNDOpT0Finder_module.cc
@@ -15,6 +15,7 @@
 #include "art/Framework/Principal/Handle.h"
 #include "art/Framework/Principal/Run.h"
 #include "art/Framework/Principal/SubRun.h"
+#include "art/Utilities/make_tool.h"
 #include "art_root_io/TFileService.h"
 #include "canvas/Utilities/InputTag.h"
 #include "canvas/Persistency/Common/Assns.h"
@@ -40,6 +41,7 @@
 #include "larcore/CoreUtils/ServiceUtil.h"
 
 #include "larsim/PhotonPropagation/SemiAnalyticalModel.h"
+#include "larsim/PhotonPropagation/OpticalPathTools/OpticalPath.h"
 #include "larsim/Simulation/LArG4Parameters.h"
 
 #include "larpandora/LArPandoraInterface/LArPandoraHelper.h"
@@ -104,6 +106,7 @@ class SBNDOpT0Finder : public art::EDProducer {
   std::unique_ptr<phot::SemiAnalyticalModel> _semi_model;
   fhicl::ParameterSet _vuv_params;
   fhicl::ParameterSet _vis_params;
+  std::shared_ptr<phot::OpticalPath> _optical_path_tool;
 
   ::flashmatch::FlashMatchManager _mgr; ///< The flash matching manager
   std::vector<flashmatch::FlashMatch_t> _result_v; ///< Matching result will be stored here
@@ -176,7 +179,8 @@ SBNDOpT0Finder::SBNDOpT0Finder(fhicl::ParameterSet const& p)
 
   _vuv_params = p.get<fhicl::ParameterSet>("VUVHits");
   _vis_params = p.get<fhicl::ParameterSet>("VIVHits");
-  _semi_model = std::make_unique<phot::SemiAnalyticalModel>(_vuv_params, _vis_params, true, false);
+  _optical_path_tool = std::shared_ptr<phot::OpticalPath>(art::make_tool<phot::OpticalPath>(p.get<fhicl::ParameterSet>("OpticalPathTool")));
+  _semi_model = std::make_unique<phot::SemiAnalyticalModel>(_vuv_params, _vis_params, _optical_path_tool, true, false);
 
   _opflash_producer_v =     p.get<std::vector<std::string>>("OpFlashProducers");
   _opflash_ara_producer_v = p.get<std::vector<std::string>>("OpFlashAraProducers");