diff --git a/TODO b/TODO
index 18ec120..019b19c 100644
--- a/TODO
+++ b/TODO
@@ -4,6 +4,7 @@ Technlology Preview 2 :
 - Implement copy-on-write on definitions (to avoid copying whole heightmaps for instance).
 - Add clouds to OpenGL with 3d textures.
 - Fix potential holes in land rendering (OpenGL and software).
+- Fix polygon culling near the camera in low-res renders (automatic tessellation ?).
 
 Technology Preview 3 :
 - Alter aerial perspective using estimation of the amount of light left after cloud layers traversal.
diff --git a/src/interface/modeler/quickapp/RenderProcess.cpp b/src/interface/modeler/quickapp/RenderProcess.cpp
index d9555f4..cdc7020 100644
--- a/src/interface/modeler/quickapp/RenderProcess.cpp
+++ b/src/interface/modeler/quickapp/RenderProcess.cpp
@@ -1,10 +1,12 @@
 #include "RenderProcess.h"
 
 #include <QSize>
+#include <QTime>
 #include "MainModelerWindow.h"
 #include "SoftwareCanvasRenderer.h"
 #include "RenderPreviewProvider.h"
 #include "RenderConfig.h"
+#include "RenderProgress.h"
 #include "Thread.h"
 #include "Canvas.h"
 #include "CanvasPreview.h"
@@ -171,6 +173,19 @@ void RenderProcess::timerEvent(QTimerEvent *)
 
     if (renderer)
     {
+        QTime t = QTime(0, 0, 0).addMSecs(renderer->getProgressHelper()->getDuration());
+        QString info = QString("Elapsed time: ") + t.toString("hh:mm:ss");
+        if (rendering)
+        {
+            unsigned long remaining = renderer->getProgressHelper()->estimateRemainingTime();
+            if (remaining > 10000)
+            {
+                t = QTime(0, 0, 0).addMSecs(remaining);
+                info += " - Remaining: ~" + t.toString("hh:mm:ss");
+            }
+        }
+        window->setQmlProperty("render_timing", "text", info);
+
         window->setQmlProperty("render_progress", "value", renderer->getProgress());
     }
 }
diff --git a/src/interface/modeler/quickapp/qml/RenderDialog.qml b/src/interface/modeler/quickapp/qml/RenderDialog.qml
index 6263c94..20b2c47 100644
--- a/src/interface/modeler/quickapp/qml/RenderDialog.qml
+++ b/src/interface/modeler/quickapp/qml/RenderDialog.qml
@@ -37,6 +37,14 @@ BaseRectangle {
         anchors.topMargin: 20
     }
 
+    Text {
+        id: render_timing
+        objectName: "render_timing"
+        anchors.top: render_progress.bottom
+        anchors.horizontalCenter: render_progress.horizontalCenter
+        anchors.topMargin: 20
+    }
+
     Timer {
         interval: 500
         running: true
diff --git a/src/render/software/RenderProgress.cpp b/src/render/software/RenderProgress.cpp
index 1243f6b..f20eedf 100644
--- a/src/render/software/RenderProgress.cpp
+++ b/src/render/software/RenderProgress.cpp
@@ -1,12 +1,16 @@
 #include "RenderProgress.h"
 
 #include "Mutex.h"
+#include "Time.h"
+#include "Logs.h"
 
 RenderProgress::RenderProgress(int count)
 {
     lock = new Mutex();
     global = 0.0;
     step = 1.0 / (double)count;
+    start_time = Time::getRelativeTimeMs();
+    end_time = 0;
 }
 
 paysages::software::RenderProgress::~RenderProgress()
@@ -24,6 +28,8 @@ void RenderProgress::reset()
         subs.pop();
     }
 
+    start_time = Time::getRelativeTimeMs();
+
     lock->release();
 }
 
@@ -65,3 +71,39 @@ void RenderProgress::exitSub()
 
     lock->release();
 }
+
+void RenderProgress::end()
+{
+    if (subs.size() > 0)
+    {
+        Logs::error() << subs.size() << " progress subs remaining at the end of render" << std::endl;
+    }
+
+    end_time = Time::getRelativeTimeMs();
+}
+
+unsigned long RenderProgress::getDuration() const
+{
+    if (end_time)
+    {
+        return end_time - start_time;
+    }
+    else
+    {
+        return Time::getRelativeTimeMs() - start_time;
+    }
+}
+
+unsigned long RenderProgress::estimateRemainingTime() const
+{
+    if (global < 0.00001)
+    {
+        return 0;
+    }
+    else
+    {
+        unsigned long done = getDuration();
+        unsigned long total = (unsigned long)((double)done / global);
+        return total - done;
+    }
+}
diff --git a/src/render/software/RenderProgress.h b/src/render/software/RenderProgress.h
index 31b7d1e..875b61f 100644
--- a/src/render/software/RenderProgress.h
+++ b/src/render/software/RenderProgress.h
@@ -30,11 +30,26 @@ public:
     void add(int value=1);
     void enterSub(int count);
     void exitSub();
+    void end();
+
+    /**
+     * Get the render duration in milliseconds.
+     */
+    unsigned long getDuration() const;
+
+    /**
+     * Get the estimated remaining time in milliseconds.
+     *
+     * Returns 0 if unknown.
+     */
+    unsigned long estimateRemainingTime() const;
 
 private:
     Mutex *lock;
     double global;
     double step;
+    unsigned long start_time;
+    unsigned long end_time;
     std::stack<RenderSub> subs;
 };
 
diff --git a/src/render/software/SoftwareCanvasRenderer.cpp b/src/render/software/SoftwareCanvasRenderer.cpp
index 607b11b..372a113 100644
--- a/src/render/software/SoftwareCanvasRenderer.cpp
+++ b/src/render/software/SoftwareCanvasRenderer.cpp
@@ -132,6 +132,7 @@ void SoftwareCanvasRenderer::render()
         }
     }
     progress->exitSub();
+    progress->end();
     finished = true;
 }
 
diff --git a/src/system/Time.cpp b/src/system/Time.cpp
new file mode 100644
index 0000000..d4315e5
--- /dev/null
+++ b/src/system/Time.cpp
@@ -0,0 +1,11 @@
+#include "Time.h"
+
+#include <QTime>
+
+static QTime EPOCH = QTime::currentTime();
+
+unsigned long Time::getRelativeTimeMs()
+{
+    return EPOCH.msecsTo(QTime::currentTime());
+}
+
diff --git a/src/system/Time.h b/src/system/Time.h
new file mode 100644
index 0000000..42c06c5
--- /dev/null
+++ b/src/system/Time.h
@@ -0,0 +1,21 @@
+#ifndef TIME_H
+#define TIME_H
+
+#include "system_global.h"
+
+namespace paysages {
+namespace system {
+
+class SYSTEMSHARED_EXPORT Time
+{
+public:
+    /**
+     * Get a timestamp in milliseconds.
+     */
+    static unsigned long getRelativeTimeMs();
+};
+
+}
+}
+
+#endif // TIME_H
diff --git a/src/system/system.pro b/src/system/system.pro
index ca6f1aa..36fdf14 100644
--- a/src/system/system.pro
+++ b/src/system/system.pro
@@ -28,7 +28,8 @@ SOURCES += \
     ParallelWorker.cpp \
     Semaphore.cpp \
     FileSystem.cpp \
-    DataFile.cpp
+    DataFile.cpp \
+    Time.cpp
 
 HEADERS += \
     system_global.h \
@@ -46,7 +47,8 @@ HEADERS += \
     ParallelWorker.h \
     Semaphore.h \
     FileSystem.h \
-    DataFile.h
+    DataFile.h \
+    Time.h
 
 unix:!symbian {
     maemo5 {
diff --git a/src/system/system_global.h b/src/system/system_global.h
index 97ef135..de9142b 100644
--- a/src/system/system_global.h
+++ b/src/system/system_global.h
@@ -23,6 +23,7 @@ namespace system {
     class Mutex;
     class Semaphore;
     class PictureWriter;
+    class Time;
 }
 }
 using namespace paysages::system;