diff --git a/export/config.py b/export/config.py
index c6b1cb07..52f006df 100644
--- a/export/config.py
+++ b/export/config.py
@@ -57,7 +57,7 @@ def convert(exporter, scene, context=None, engine=None):
             _convert_dlscache_settings(scene, definitions, config)
 
         if config.photongi.enabled:
-            _convert_photongi_settings(scene, definitions, config)
+            _convert_photongi_settings(context, scene, definitions, config)
 
         if config.path.use_clamping:
             definitions["path.clamping.variance.maxvalue"] = config.path.clamping
@@ -330,7 +330,7 @@ def _convert_dlscache_settings(scene, definitions, config):
     })
 
 
-def _convert_photongi_settings(scene, definitions, config):
+def _convert_photongi_settings(context, scene, definitions, config):
     photongi = config.photongi
     worldscale = utils.get_worldscale(scene, as_scalematrix=False)
 
@@ -351,10 +351,21 @@ def _convert_photongi_settings(scene, definitions, config):
     caustic_radius = photongi.caustic_lookup_radius * worldscale
     caustic_merge_radius_scale = photongi.caustic_merge_radius_scale if photongi.caustic_merge_enabled else 0
 
-    file_path = utils.get_abspath(photongi.file_path, library=scene.library)
-    if os.path.isfile(file_path) and photongi.save_or_overwrite:
-        # Overwrite the file
-        os.remove(file_path)
+    file_path_abs = utils.get_abspath(photongi.file_path, library=scene.library)
+    if not os.path.isfile(file_path_abs) and not photongi.save_or_overwrite:
+        # Do not save the cache file
+        file_path = ""
+    else:
+        if utils.use_filesaver(context, scene) and photongi.file_path.startswith("//"):
+            # It is a relative path and we are using filesaver - don't make it
+            # an absolute path, just strip the leading "//"
+            file_path = photongi.file_path[2:]
+        else:
+            file_path = file_path_abs
+            if os.path.isfile(file_path) and photongi.save_or_overwrite:
+                # To overwrite the file, we first have to delete it, otherwise
+                # LuxCore loads the cache from this file
+                os.remove(file_path)
 
     definitions.update({
         "path.photongi.photon.maxcount": round(photongi.photon_maxcount * 1000000),