diff --git a/editor/editor_file_system.cpp b/editor/editor_file_system.cpp
index 807f0c8eb74..ad11f6135c4 100644
--- a/editor/editor_file_system.cpp
+++ b/editor/editor_file_system.cpp
@@ -2436,7 +2436,13 @@ void EditorFileSystem::reimport_files(const Vector<String> &p_files) {
 
 Error EditorFileSystem::reimport_append(const String &p_file, const HashMap<StringName, Variant> &p_custom_options, const String &p_custom_importer, Variant p_generator_parameters) {
 	ERR_FAIL_COND_V_MSG(!importing, ERR_INVALID_PARAMETER, "Can only append files to import during a current reimport process.");
-	return _reimport_file(p_file, p_custom_options, p_custom_importer, &p_generator_parameters);
+	Error ret = _reimport_file(p_file, p_custom_options, p_custom_importer, &p_generator_parameters);
+
+	// Emit the resource_reimported signal for the single file we just reimported.
+	Vector<String> reloads;
+	reloads.append(p_file);
+	emit_signal(SNAME("resources_reimported"), reloads);
+	return ret;
 }
 
 Error EditorFileSystem::_resource_import(const String &p_path) {
diff --git a/modules/gltf/gltf_document.cpp b/modules/gltf/gltf_document.cpp
index 4060f7f6268..ee093a1f1b1 100644
--- a/modules/gltf/gltf_document.cpp
+++ b/modules/gltf/gltf_document.cpp
@@ -3218,7 +3218,7 @@ void GLTFDocument::_parse_image_save_image(Ref<GLTFState> p_state, const Vector<
 			bool must_import = true;
 			Vector<uint8_t> img_data = p_image->get_data();
 			Dictionary generator_parameters;
-			String file_path = p_state->get_base_path() + "/" + p_state->filename.get_basename() + "_" + p_image->get_name();
+			String file_path = p_state->get_base_path().path_join(p_state->filename.get_basename() + "_" + p_image->get_name());
 			file_path += p_file_extension.is_empty() ? ".png" : p_file_extension;
 			if (FileAccess::exists(file_path + ".import")) {
 				Ref<ConfigFile> config;
@@ -3230,6 +3230,8 @@ void GLTFDocument::_parse_image_save_image(Ref<GLTFState> p_state, const Vector<
 				if (!generator_parameters.has("md5")) {
 					must_import = false; // Didn't come from a gltf document; don't overwrite.
 				}
+			}
+			if (must_import) {
 				String existing_md5 = generator_parameters["md5"];
 				unsigned char md5_hash[16];
 				CryptoCore::md5(img_data.ptr(), img_data.size(), md5_hash);