diff --git a/openpype/hosts/standalonepublisher/plugins/publish/validate_texture_workfiles.py b/openpype/hosts/standalonepublisher/plugins/publish/validate_texture_workfiles.py
index 56ea82f6b6..a7ae02a2eb 100644
--- a/openpype/hosts/standalonepublisher/plugins/publish/validate_texture_workfiles.py
+++ b/openpype/hosts/standalonepublisher/plugins/publish/validate_texture_workfiles.py
@@ -1,5 +1,7 @@
+import os
 import pyblish.api
 
+from openpype.settings import get_project_settings
 from openpype.pipeline.publish import (
     ValidateContentsOrder,
     PublishXmlValidationError,
@@ -18,23 +20,38 @@ class ValidateTextureBatchWorkfiles(pyblish.api.InstancePlugin):
     families = ["texture_batch_workfile"]
     optional = True
 
-    # from presets
-    main_workfile_extensions = ['mra']
-
     def process(self, instance):
         if instance.data["family"] == "workfile":
             ext = instance.data["representations"][0]["ext"]
-            if ext not in self.main_workfile_extensions:
+            main_workfile_extensions = self.get_main_workfile_extensions()
+            if ext not in main_workfile_extensions:
                 self.log.warning("Only secondary workfile present!")
                 return
 
             if not instance.data.get("resources"):
                 msg = "No secondary workfile present for workfile '{}'". \
                     format(instance.data["name"])
-                ext = self.main_workfile_extensions[0]
+                ext = main_workfile_extensions[0]
                 formatting_data = {"file_name": instance.data["name"],
                                    "extension": ext}
 
                 raise PublishXmlValidationError(self, msg,
                                                 formatting_data=formatting_data
                                                 )
+
+    @staticmethod
+    def get_main_workfile_extensions():
+        project_settings = get_project_settings(os.environ["AVALON_PROJECT"])
+
+        try:
+            extensions = (project_settings["standalonepublisher"]
+                                          ["publish"]
+                                          ["CollectTextures"]
+                                          ["main_workfile_extensions"])
+        except KeyError:
+            raise Exception("Setting 'Main workfile extensions' not found."
+                            " The setting must be set for the"
+                            " 'Collect Texture' publish plugin of the"
+                            " 'Standalone Publish' tool.")
+
+        return extensions