diff --git a/src/core/gpu.h b/src/core/gpu.h
index 2ef99145c..c29e04739 100644
--- a/src/core/gpu.h
+++ b/src/core/gpu.h
@@ -412,16 +412,27 @@ protected:
   virtual void DrawRendererStats(bool is_idle_frame);
 
   // These are **very** approximate.
-  ALWAYS_INLINE void AddDrawTriangleTicks(u32 width, u32 height, bool textured, bool shaded)
+  ALWAYS_INLINE void AddDrawTriangleTicks(u32 width, u32 height, bool shaded, bool textured, bool semitransparent)
   {
-#if 0
-    const u32 draw_ticks = static_cast<u32>((std::abs(x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2)) + 1u) / 2u);
-#else
-    const u32 draw_ticks = ((width + 2) / 3) * height;
-#endif
-    AddCommandTicks(draw_ticks);
+    const u32 average_width = ((width + 2) / 3);
+    u32 ticks_per_row = average_width;
+    if (textured)
+      ticks_per_row += average_width;
+    if (semitransparent || m_GPUSTAT.check_mask_before_draw)
+      ticks_per_row += (average_width + 1u) / 2u;
+
+    AddCommandTicks(ticks_per_row * height);
+  }
+  ALWAYS_INLINE void AddDrawRectangleTicks(u32 width, u32 height, bool textured, bool semitransparent)
+  {
+    u32 ticks_per_row = width;
+    if (textured)
+      ticks_per_row += width;
+    if (semitransparent || m_GPUSTAT.check_mask_before_draw)
+      ticks_per_row += (width + 1u) / 2u;
+
+    AddCommandTicks(ticks_per_row * height);
   }
-  ALWAYS_INLINE void AddDrawRectangleTicks(u32 width, u32 height, bool textured) { AddCommandTicks(width * height); }
   ALWAYS_INLINE void AddDrawLineTicks(u32 width, u32 height, bool shaded) { AddCommandTicks(std::max(width, height)); }
 
   HostDisplay* m_host_display = nullptr;
diff --git a/src/core/gpu_hw.cpp b/src/core/gpu_hw.cpp
index 95d21ce62..569e49c45 100644
--- a/src/core/gpu_hw.cpp
+++ b/src/core/gpu_hw.cpp
@@ -241,7 +241,8 @@ void GPU_HW::LoadVertices()
           static_cast<u32>(std::clamp<s32>(max_y, m_drawing_area.top, m_drawing_area.bottom)) + 1u;
 
         m_vram_dirty_rect.Include(clip_left, clip_right, clip_top, clip_bottom);
-        AddDrawTriangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.texture_enable, rc.shading_enable);
+        AddDrawTriangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.shading_enable, rc.texture_enable,
+                             rc.transparency_enable);
 
         std::memcpy(m_batch_current_vertex_ptr, vertices.data(), sizeof(BatchVertex) * 3);
         m_batch_current_vertex_ptr += 3;
@@ -271,7 +272,8 @@ void GPU_HW::LoadVertices()
             static_cast<u32>(std::clamp<s32>(max_y_123, m_drawing_area.top, m_drawing_area.bottom)) + 1u;
 
           m_vram_dirty_rect.Include(clip_left, clip_right, clip_top, clip_bottom);
-          AddDrawTriangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.texture_enable, rc.shading_enable);
+          AddDrawTriangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.shading_enable, rc.texture_enable,
+                               rc.transparency_enable);
 
           AddVertex(vertices[2]);
           AddVertex(vertices[1]);
@@ -367,7 +369,7 @@ void GPU_HW::LoadVertices()
         static_cast<u32>(std::clamp<s32>(pos_y + rectangle_height, m_drawing_area.top, m_drawing_area.bottom)) + 1u;
 
       m_vram_dirty_rect.Include(clip_left, clip_right, clip_top, clip_bottom);
-      AddDrawRectangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.texture_enable);
+      AddDrawRectangleTicks(clip_right - clip_left, clip_bottom - clip_top, rc.texture_enable, rc.transparency_enable);
     }
     break;
 
diff --git a/src/core/gpu_sw.cpp b/src/core/gpu_sw.cpp
index bfb7a2131..a129088d8 100644
--- a/src/core/gpu_sw.cpp
+++ b/src/core/gpu_sw.cpp
@@ -433,7 +433,7 @@ void GPU_SW::DrawTriangle(const SWVertex* v0, const SWVertex* v1, const SWVertex
   max_x = std::clamp(max_x, static_cast<s32>(m_drawing_area.left), static_cast<s32>(m_drawing_area.right));
   min_y = std::clamp(min_y, static_cast<s32>(m_drawing_area.top), static_cast<s32>(m_drawing_area.bottom));
   max_y = std::clamp(max_y, static_cast<s32>(m_drawing_area.top), static_cast<s32>(m_drawing_area.bottom));
-  AddDrawTriangleTicks(max_x - min_x + 1, max_y - min_y + 1, texture_enable, shading_enable);
+  AddDrawTriangleTicks(max_x - min_x + 1, max_y - min_y + 1, shading_enable, texture_enable, transparency_enable);
 
   // compute per-pixel increments
   const s32 a01 = py0 - py1, b01 = px1 - px0;
@@ -539,7 +539,7 @@ void GPU_SW::DrawRectangle(s32 origin_x, s32 origin_y, u32 width, u32 height, u8
     const u32 clip_bottom =
       static_cast<u32>(std::clamp<s32>(start_y + static_cast<s32>(height), m_drawing_area.top, m_drawing_area.bottom)) +
       1u;
-    AddDrawRectangleTicks(clip_right - clip_left, clip_bottom - clip_top, texture_enable);
+    AddDrawRectangleTicks(clip_right - clip_left, clip_bottom - clip_top, texture_enable, transparency_enable);
   }
 
   for (u32 offset_y = 0; offset_y < height; offset_y++)