Merge branch 'blender-v3.0-release'

source/blender/draw/engines/eevee/eevee_motion_blur.c

@@ -29,6 +29,7 @@
 
 #include "BKE_animsys.h"
 #include "BKE_camera.h"
+#include "BKE_duplilist.h"
 #include "BKE_object.h"
 #include "BKE_screen.h"
 
@@ -318,6 +319,14 @@ void EEVEE_motion_blur_cache_populate(EEVEE_ViewLayerData *UNUSED(sldata),
     return;
   }
 
+  const DupliObject *dup = DRW_object_get_dupli(ob);
+  if (dup != NULL && dup->ob->data != dup->ob_data) {
+    /* Geometry instances do not support motion blur correctly yet. The #key used in
+     * #motion_blur_deform_data_get has to take ids of instances (#DupliObject.persistent_id) into
+     * account. Otherwise it can't find matching geometry instances at different points in time. */
+    return;
+  }
+
   EEVEE_ObjectMotionData *mb_data = EEVEE_motion_blur_object_data_get(
       &effects->motion_blur, ob, false);