tweak

selfdrive/ui/qt/offroad/driverview.cc

@@ -67,7 +67,10 @@ void DriverViewScene::paintEvent(QPaintEvent* event) {
     float face_std = std::max(std_list[0], std_list[1]);
 
     float alpha = 0.7;
-    const int box_size = 250;
+    if (face_std > 0.15) {
+      alpha = std::max(0.7 - (face_std-0.15)*3.5, 0.0);
+    }
+    const int box_size = 220;
     // use approx instead of distort_points
     int fbox_x = 964.0 + 1530.0 * (is_rhd ? face_x : -face_x);
     int fbox_y = (450.0 + std::abs(face_x)*100.0) + (1076.0 - std::abs(face_x)*646.0) * face_y;