diff --git a/prop_instance.cpp b/prop_instance.cpp
index 2faefdd..7ace004 100644
--- a/prop_instance.cpp
+++ b/prop_instance.cpp
@@ -76,6 +76,10 @@ void PropInstance::_build_finished() {
 }
 
 void PropInstance::prop_preprocess(Transform transform, const Ref<PropData> &prop) {
+	call("_prop_preprocess", transform, prop);
+}
+
+void PropInstance::_prop_preprocess(Transform transform, const Ref<PropData> &prop) {
 	ERR_FAIL_COND(!prop.is_valid());
 
 	int count = prop->get_prop_count();
@@ -185,6 +189,13 @@ void PropInstance::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_prop_data", "value"), &PropInstance::set_prop_data);
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "prop_data", PROPERTY_HINT_RESOURCE_TYPE, "PropData"), "set_prop_data", "get_prop_data");
 
+	BIND_VMETHOD(MethodInfo("_prop_preprocess", 
+					PropertyInfo(Variant::TRANSFORM, "tarnsform"), 
+					PropertyInfo(Variant::OBJECT, "prop_data", PROPERTY_HINT_RESOURCE_TYPE, "PropData")));
+
+	ClassDB::bind_method(D_METHOD("prop_preprocess", "tarnsform", "prop"), &PropInstance::prop_preprocess);
+	ClassDB::bind_method(D_METHOD("_prop_preprocess", "tarnsform", "prop"), &PropInstance::_prop_preprocess);
+
 	//---
 	BIND_VMETHOD(MethodInfo("_init_materials"));
 
diff --git a/prop_instance.h b/prop_instance.h
index 20b7b0f..d7b00ce 100644
--- a/prop_instance.h
+++ b/prop_instance.h
@@ -55,6 +55,7 @@ public:
 	virtual void _build_finished();
 
 	void prop_preprocess(Transform tarnsform, const Ref<PropData> &prop);
+	virtual void _prop_preprocess(Transform tarnsform, const Ref<PropData> &prop);
 
 	PropInstance();
 	~PropInstance();
diff --git a/prop_instance_merger.cpp b/prop_instance_merger.cpp
index 1001d97..4b4b4ae 100644
--- a/prop_instance_merger.cpp
+++ b/prop_instance_merger.cpp
@@ -225,7 +225,7 @@ void PropInstanceMerger::_build() {
 void PropInstanceMerger::_build_finished() {
 }
 
-void PropInstanceMerger::prop_preprocess(Transform transform, const Ref<PropData> &prop) {
+void PropInstanceMerger::_prop_preprocess(Transform transform, const Ref<PropData> &prop) {
 	ERR_FAIL_COND(!prop.is_valid());
 
 	int count = prop->get_prop_count();
diff --git a/prop_instance_merger.h b/prop_instance_merger.h
index 2626d6b..1e77a04 100644
--- a/prop_instance_merger.h
+++ b/prop_instance_merger.h
@@ -96,7 +96,7 @@ public:
 	virtual void _build();
 	virtual void _build_finished();
 
-	void prop_preprocess(Transform tarnsform, const Ref<PropData> &prop);
+	void _prop_preprocess(Transform tarnsform, const Ref<PropData> &prop);
 
 	PropInstanceMerger();
 	~PropInstanceMerger();