Restore region bounds and exact profile measurements after reload

src/scene/convert/tess.rs

@@ -1719,6 +1719,15 @@ pub(crate) fn set_wire_aabb(w: &mut WireModel, entity_box: [f32; 4]) {
 }
 
 fn entity_bounds(e: &acadrust::EntityType) -> ([f64; 3], [f64; 3]) {
+    if let acadrust::EntityType::Region(region) = e {
+        if region.wires.is_empty() {
+            if let Some(bounds) = super::solid3d_tess::kernel_region_body(region)
+                .and_then(|body| cadkernel::brep::body_bounds(&body))
+            {
+                return (bounds.min, bounds.max);
+            }
+        }
+    }
     if let acadrust::EntityType::Line(line) = e {
         if let Some(association) = acadrust::entities::CenterMarkAssociation::read(
             &line.common.extended_data,