diff --git a/src/app/update/command.rs b/src/app/update/command.rs
index 97ba54799..f1f2ab6e7 100644
--- a/src/app/update/command.rs
+++ b/src/app/update/command.rs
@@ -165,6 +165,12 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                     {
                         entity.apply_grip_menu_value(pending.grip_id, pending.action, v);
                     }
+                    // A typed grip-menu value reshapes dimensions too — drop a
+                    // stale baked *D block (no-op for non-dims). (#398)
+                    crate::modules::draw::modify::explode::invalidate_dim_block(
+                        &mut self.tabs[i].scene.document,
+                        pending.handle,
+                    );
                     self.tabs[i].scene.bump_geometry();
                     self.tabs[i].dirty = true;
                     self.refresh_selected_grips();
@@ -950,6 +956,12 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                 if let Some(entity) = self.tabs[i].scene.document.get_entity_mut(popup.handle) {
                     entity.apply_grip_menu(popup.grip_id, item.action);
                 }
+                // Menu actions reshape dimensions too — drop a stale baked *D
+                // block so the edit is visible (no-op for non-dims). (#398)
+                crate::modules::draw::modify::explode::invalidate_dim_block(
+                    &mut self.tabs[i].scene.document,
+                    popup.handle,
+                );
                 self.tabs[i].scene.bump_geometry();
                 self.tabs[i].dirty = true;
                 self.refresh_selected_grips();
diff --git a/src/scene/modify.rs b/src/scene/modify.rs
index 938e6893a..85efab741 100644
--- a/src/scene/modify.rs
+++ b/src/scene/modify.rs
@@ -391,6 +391,11 @@ impl Scene {
         if let Some(entity) = self.document.get_entity_mut(handle) {
             view::dispatch::apply_grip(entity, grip_id, apply);
         }
+        // A dimension loaded from a file renders through its baked *D block;
+        // the grip only moved a definition point, so the baked graphics are
+        // stale — drop them so tessellation falls back to the live geometry
+        // and the next save re-bakes (no-op for non-dimensions). (#398)
+        crate::modules::draw::modify::explode::invalidate_dim_block(&mut self.document, handle);
 
         // Translate MeshModel vertices by the same delta the grip applied.
         if let Some(old) = old_por {