diff --git a/ROADMAP.md b/ROADMAP.md
index dc9a2dcf2..e62ae9618 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -162,6 +162,14 @@ geometry is camera-invariant.
   changed),
 - `frame_visible[handle] → bool` (recomputed per `camera_generation`).
 
+**Partial (landed):** `set_hover_highlight` no longer bumps the geometry
+epoch (a full re-tessellation) when the hovered entity is already selected —
+the effective highlight set `selected ∪ {hover}` is then unchanged, so the
+tessellation output is identical. Hovering over / between selected entities
+is now free. The full camera/selection-from-tessellation split is still open
+and needs running-app verification (highlight colour is baked into
+`WireModel.color` across several tessellation sites).
+
 ### 3.2 Persistent GPU buffer pool — diff upload
 
 Today every wire GPU buffer is re-uploaded when
diff --git a/src/scene/mod.rs b/src/scene/mod.rs
index b4e3b1a40..130381afb 100644
--- a/src/scene/mod.rs
+++ b/src/scene/mod.rs
@@ -1367,8 +1367,20 @@ impl Scene {
     /// Set (or clear) the previewed entity that renders with the selection
     /// highlight without joining the real selection. Re-tessellates on change.
     pub fn set_hover_highlight(&mut self, handle: Option<Handle>) {
-        if self.hover_highlight != handle {
-            self.hover_highlight = handle;
+        if self.hover_highlight == handle {
+            return;
+        }
+        // The hover entity is folded into the tessellation highlight set
+        // (selected ∪ {hover}); see `wires_for_block_culled`. A hover handle
+        // that's already selected contributes nothing, so the effective set —
+        // and thus every WireModel — is identical. Only re-tessellate when the
+        // effective highlight contribution actually changes; hovering over (or
+        // between) already-selected entities then costs nothing. The field is
+        // still updated so hit-test / UI state stays current.
+        let contribution = |h: Option<Handle>| h.filter(|h| !self.selected.contains(h));
+        let changed = contribution(self.hover_highlight) != contribution(handle);
+        self.hover_highlight = handle;
+        if changed {
             self.bump_geometry();
         }
     }