diff --git a/addons/io_scene_gltf2/blender/exp/material/gltf2_blender_gather_image.py b/addons/io_scene_gltf2/blender/exp/material/gltf2_blender_gather_image.py
index 05846f701..12eb41992 100644
--- a/addons/io_scene_gltf2/blender/exp/material/gltf2_blender_gather_image.py
+++ b/addons/io_scene_gltf2/blender/exp/material/gltf2_blender_gather_image.py
@@ -348,7 +348,10 @@ def __get_image_data_mapping(sockets, results, use_tile, export_settings) -> Exp
                     else:
                         composed_image.fill_image(result.shader_node.image, dst_chan, src_chan)
                 else:
-                    composed_image.fill_image_bw_tile(result.shader_node.image, export_settings['current_udim_info']['tile'], dst_chan)
+                    if src_chan == Channel.RGB2BW:
+                        composed_image.fill_image_bw_tile(result.shader_node.image, export_settings['current_udim_info']['tile'], dst_chan)
+                    else:
+                        composed_image.fill_image_tile(result.shader_node.image, export_settings['current_udim_info']['tile'], dst_chan, src_chan)
 
                 # Since metal/roughness are always used together, make sure
                 # the other channel is filled.