glTF exporter: workaround for image size copy not stored

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 8, 15),
+    "version": (1, 8, 16),
     'blender': (3, 1, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_image.py

@@ -245,8 +245,10 @@ def _make_temp_image_copy(guard: TmpImageGuard, src_image: bpy.types.Image):
     tmp_image = guard.image
 
     tmp_image.update()
+    # See #1564 and T95616
+    tmp_image.scale(*src_image.size)
 
-    if src_image.is_dirty:
+    if src_image.is_dirty: # Warning, img size change doesn't make it dirty, see T95616
         # Unsaved changes aren't copied by .copy(), so do them ourselves
         tmp_buf = np.empty(src_image.size[0] * src_image.size[1] * 4, np.float32)
         src_image.pixels.foreach_get(tmp_buf)