diff --git a/src/app/main.cpp b/src/app/main.cpp
index b58d03b..1260151 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -406,10 +406,6 @@ void buildWorkbench(QMainWindow& window, geopro::data::LocalSampleRepository& re
                 }
                 vtkRenderWindowInteractor* interactor = renderWindowPtr->GetInteractor();
                 if (*showSlice && interactor) {
-                    // 交互时目标帧率↑→体绘制自动降采样(AutoAdjustSampleDistances)，拖切片不卡;
-                    // 松手后按 StillUpdateRate 恢复全质量。
-                    interactor->SetDesiredUpdateRate(20.0);
-                    interactor->SetStillUpdateRate(0.001);
                     const std::vector<double> stops = vcs.stopValues();
                     const double vmn = stops.size() >= 2 ? stops.front() : 0.0;
                     const double vmx = stops.size() >= 2 ? stops.back() : 1.0;
diff --git a/src/render/actors/VoxelActor.cpp b/src/render/actors/VoxelActor.cpp
index 973e97a..4dfd7ef 100644
--- a/src/render/actors/VoxelActor.cpp
+++ b/src/render/actors/VoxelActor.cpp
@@ -74,9 +74,9 @@ vtkSmartPointer<vtkVolume> buildVoxel(const geopro::core::ScalarVolume& vol,
     // SmartVolumeMapper：有 GPU 走 GPU ray cast，否则自动回退 CPU，避免无 GPU 时卡死/失败。
     vtkNew<vtkSmartVolumeMapper> mapper;
     mapper->SetInputData(img);
-    // 交互时按 DesiredUpdateRate 自动降采样(与切片共渲时拖动更流畅)；静止恢复全质量。
-    mapper->SetAutoAdjustSampleDistances(1);
-    mapper->SetInteractiveAdjustSampleDistances(1);
+    // 全程统一全质量(GPU 足够快, 实测 ~7ms/帧)：关掉交互降采样, 避免"停手补高清"那一帧突跳停顿。
+    mapper->SetAutoAdjustSampleDistances(0);
+    mapper->SetInteractiveAdjustSampleDistances(0);
 
     vtkNew<vtkVolumeProperty> prop;
     prop->SetColor(color);