From 771170e7b06daea4f4dbf41d52dac4d74b11a9ec Mon Sep 17 00:00:00 2001
From: Fazil Babu <fazil47babu@gmail.com>
Date: Wed, 16 Feb 2022 19:59:51 +0530
Subject: [PATCH] Default material is assigned to meshes without material for
 glTF export

---
 modules/gltf/gltf_document.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/gltf/gltf_document.cpp b/modules/gltf/gltf_document.cpp
index f555c8912d5..d79b4f6c1bc 100644
--- a/modules/gltf/gltf_document.cpp
+++ b/modules/gltf/gltf_document.cpp
@@ -5060,6 +5060,9 @@ GLTFMeshIndex GLTFDocument::_convert_mesh_to_gltf(Ref<GLTFState> state, MeshInst
 			String mat_name;
 			if (mat.is_valid()) {
 				mat_name = mat->get_name();
+			} else {
+				// Assign default material when no material is assigned.
+				mat = Ref<StandardMaterial3D>(memnew(StandardMaterial3D));
 			}
 			current_mesh->add_surface(import_mesh->surface_get_primitive_type(surface_i),
 					array, import_mesh->surface_get_blend_shape_arrays(surface_i), import_mesh->surface_get_lods(surface_i), mat,