1 files changed, 6 insertions, 4 deletions
diff --git a/intern/cycles/render/geometry.cpp b/intern/cycles/render/geometry.cpp
index e9a70e4b3fd..124a41db21e 100644
--- a/intern/cycles/render/geometry.cpp
+++ b/intern/cycles/render/geometry.cpp
@@ -1917,9 +1917,12 @@ void GeometryManager::device_update(Device *device,
     }
   }
 
-  /* update the bvh even when there is no geometry so the kernel bvh data is still valid,
-   * especially when removing all of the objects during interactive renders */
-  bool need_update_scene_bvh = (scene->bvh == nullptr);
+  /* Update the BVH even when there is no geometry so the kernel's BVH data is still valid,
+   * especially when removing all of the objects during interactive renders.
+   * Also update the BVH if the transformations change, we cannot rely on tagging the Geometry
+   * as modified in this case, as we may accumulate displacement if the vertices do not also
+   * change. */
+  bool need_update_scene_bvh = (scene->bvh == nullptr || (update_flags & TRANSFORM_MODIFIED) != 0);
   {
     scoped_callback_timer timer([scene](double time) {
       if (scene->update_stats) {
@@ -1961,7 +1964,6 @@ void GeometryManager::device_update(Device *device,
         scene->update_stats->geometry.times.add_entry({"device_update (compute bounds)", time});
       }
     });
-    vector<Object *> volume_objects;
     foreach (Object *object, scene->objects) {
       object->compute_bounds(motion_blur);
     }