diff --git a/.gitignore b/.gitignore
index d4ed9dd45c..7b030950ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # General build artifacts
 default/
+build/
 
 # clangd cache
 .cache/
diff --git a/docs/reference/json-map-format.rst b/docs/reference/json-map-format.rst
index b4cd7faf86..73d8b4db38 100644
--- a/docs/reference/json-map-format.rst
+++ b/docs/reference/json-map-format.rst
@@ -216,6 +216,7 @@ Object
     polyline,         array,            "Array of :ref:`Points <json-point>`, in case the object is a polyline"
     properties,       array,            "Array of :ref:`Properties <json-property>`"
     rotation,         double,           "Angle in degrees clockwise"
+    opacity,          double,           "The opacity of the object as a value from 0 to 1. Defaults to 1."
     template,         string,           "Reference to a template file, in case object is a :doc:`template instance </manual/using-templates>`"
     text,             :ref:`json-object-text`, "Only used for text objects"
     type,             string,           "The class of the object (was saved as ``class`` in 1.9, optional)"
@@ -241,6 +242,7 @@ Object Example
           "value":12
         }],
       "rotation":0,
+      "opacity":1,
       "type":"npc",
       "visible":true,
       "width":0,
@@ -259,6 +261,7 @@ Ellipse Example
       "id":13,
       "name":"",
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":248,
@@ -276,6 +279,7 @@ Rectangle Example
       "id":14,
       "name":"",
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":368,
@@ -294,6 +298,7 @@ Point Example
       "name":"",
       "point":true,
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":0,
@@ -332,6 +337,7 @@ Polygon Example
         "y":-288
       }],
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":0,
@@ -374,6 +380,7 @@ Polyline Example
         "y":0
       }],
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":0,
@@ -396,6 +403,7 @@ Text Example
         "wrap":true
       },
       "rotation":0,
+      "opacity":1,
       "type":"",
       "visible":true,
       "width":248,
diff --git a/docs/reference/tmx-map-format.rst b/docs/reference/tmx-map-format.rst
index 1df38f5e57..49a5a96b48 100644
--- a/docs/reference/tmx-map-format.rst
+++ b/docs/reference/tmx-map-format.rst
@@ -549,6 +549,8 @@ Can contain any number: :ref:`tmx-object`
 -  **height:** The height of the object in pixels. (defaults to 0)
 -  **rotation:** The rotation of the object in degrees clockwise around (x, y). 
    (defaults to 0)
+-  **opacity:** The opacity of the object as a value from 0 to 1. (defaults
+   to 1)
 -  **gid:** A reference to a tile. (optional)
 -  **visible:** Whether the object is shown (1) or hidden (0). (defaults to
    1)
diff --git a/src/libtiled/mapobject.cpp b/src/libtiled/mapobject.cpp
index a517801a98..58595702eb 100644
--- a/src/libtiled/mapobject.cpp
+++ b/src/libtiled/mapobject.cpp
@@ -312,6 +312,7 @@ QVariant MapObject::mapObjectProperty(Property property) const
     case PositionProperty:      return mPos;
     case SizeProperty:          return mSize;
     case RotationProperty:      return mRotation;
+    case OpacityProperty:       return mOpacity;
     case CellProperty:          Q_ASSERT(false); break;
     case ShapeProperty:         return mShape;
     case TemplateProperty:      Q_ASSERT(false); break;
@@ -334,6 +335,7 @@ void MapObject::setMapObjectProperty(Property property, const QVariant &value)
     case PositionProperty:      setPosition(value.toPointF()); break;
     case SizeProperty:          setSize(value.toSizeF()); break;
     case RotationProperty:      setRotation(value.toReal()); break;
+    case OpacityProperty:       setOpacity(value.toReal()); break;
     case CellProperty:          Q_ASSERT(false); break;
     case ShapeProperty:         setShape(value.value<Shape>()); break;
     case TemplateProperty:      Q_ASSERT(false); break;
@@ -374,6 +376,7 @@ MapObject *MapObject::clone() const
     o->setShape(mShape);
     o->setCell(mCell);
     o->setRotation(mRotation);
+    o->setOpacity(mOpacity);
     o->setVisible(mVisible);
     o->setChangedProperties(mChangedProperties);
     o->setObjectTemplate(mObjectTemplate);
@@ -389,6 +392,7 @@ void MapObject::copyPropertiesFrom(const MapObject *object)
     setShape(object->shape());
     setCell(object->cell());
     setRotation(object->rotation());
+    setOpacity(object->opacity());
     setVisible(object->isVisible());
     setProperties(object->properties());
     setChangedProperties(object->changedProperties());
@@ -428,6 +432,9 @@ void MapObject::syncWithTemplate()
     if (!propertyChanged(MapObject::RotationProperty))
         setRotation(base->rotation());
 
+    if (!propertyChanged(MapObject::OpacityProperty))
+        setOpacity(base->opacity());
+
     if (!propertyChanged(MapObject::VisibleProperty))
         setVisible(base->isVisible());
 }
diff --git a/src/libtiled/mapobject.h b/src/libtiled/mapobject.h
index 4e8ae8ab27..bd24ae362c 100644
--- a/src/libtiled/mapobject.h
+++ b/src/libtiled/mapobject.h
@@ -117,10 +117,11 @@ class TILEDSHARED_EXPORT MapObject : public Object
         PositionProperty        = 1 << 7,
         SizeProperty            = 1 << 8,
         RotationProperty        = 1 << 9,
-        CellProperty            = 1 << 10,
-        ShapeProperty           = 1 << 11,
-        TemplateProperty        = 1 << 12,
-        CustomProperties        = 1 << 13,
+        OpacityProperty         = 1 << 10,
+        CellProperty            = 1 << 11,
+        ShapeProperty           = 1 << 12,
+        TemplateProperty        = 1 << 13,
+        CustomProperties        = 1 << 14,
         AllProperties           = 0xFF
     };
 
@@ -200,6 +201,9 @@ class TILEDSHARED_EXPORT MapObject : public Object
     qreal rotation() const;
     void setRotation(qreal rotation);
 
+    qreal opacity() const;
+    void setOpacity(qreal opacity);
+
     Alignment alignment(const Map *map = nullptr) const;
 
     bool isVisible() const;
@@ -247,6 +251,7 @@ class TILEDSHARED_EXPORT MapObject : public Object
     const ObjectTemplate *mObjectTemplate = nullptr;
     ObjectGroup *mObjectGroup = nullptr;
     qreal mRotation = 0.0;
+    qreal mOpacity = 1.0;
     bool mVisible = true;
     bool mTemplateBase = false;
     ChangedProperties mChangedProperties;
@@ -479,6 +484,18 @@ inline qreal MapObject::rotation() const
 inline void MapObject::setRotation(qreal rotation)
 { mRotation = rotation; }
 
+/**
+ * Returns the opacity of the object.
+ */
+inline qreal MapObject::opacity() const
+{ return mOpacity; }
+
+/**
+ * Sets the opacity of the object.
+ */
+inline void MapObject::setOpacity(qreal opacity)
+{ mOpacity = opacity; }
+
 inline bool MapObject::isVisible() const
 { return mVisible; }
 
diff --git a/src/libtiled/mapreader.cpp b/src/libtiled/mapreader.cpp
index 820eed8b43..c5454cc11b 100644
--- a/src/libtiled/mapreader.cpp
+++ b/src/libtiled/mapreader.cpp
@@ -1222,6 +1222,12 @@ std::unique_ptr<MapObject> MapReaderPrivate::readObject()
         object->setPropertyChanged(MapObject::RotationProperty);
     }
 
+    const qreal opacity = atts.value(QLatin1String("opacity")).toDouble(&ok);
+    if (ok) {
+        object->setOpacity(opacity);
+        object->setPropertyChanged(MapObject::OpacityProperty);
+    }
+
     if (gid) {
         object->setCell(cellForGid(gid));
         object->setPropertyChanged(MapObject::CellProperty);
diff --git a/src/libtiled/maptovariantconverter.cpp b/src/libtiled/maptovariantconverter.cpp
index 93e7fb882f..32cde229b4 100644
--- a/src/libtiled/maptovariantconverter.cpp
+++ b/src/libtiled/maptovariantconverter.cpp
@@ -586,6 +586,9 @@ QVariant MapToVariantConverter::toVariant(const MapObject &object) const
     if (notTemplateInstance || object.propertyChanged(MapObject::RotationProperty))
         objectVariant[QStringLiteral("rotation")] = object.rotation();
 
+    if (notTemplateInstance || object.propertyChanged(MapObject::OpacityProperty))
+        objectVariant[QStringLiteral("opacity")] = object.opacity();
+
     if (notTemplateInstance || object.propertyChanged(MapObject::VisibleProperty))
         objectVariant[QStringLiteral("visible")] = object.isVisible();
 
diff --git a/src/libtiled/mapwriter.cpp b/src/libtiled/mapwriter.cpp
index d6c4f3265d..265d708c13 100644
--- a/src/libtiled/mapwriter.cpp
+++ b/src/libtiled/mapwriter.cpp
@@ -756,6 +756,10 @@ void MapWriterPrivate::writeObject(QXmlStreamWriter &w,
     if (shouldWrite(rotation != 0.0, isTemplateInstance, mapObject.propertyChanged(MapObject::RotationProperty)))
         w.writeAttribute(QStringLiteral("rotation"), QString::number(rotation));
 
+    const qreal opacity = mapObject.opacity();
+    if (shouldWrite(opacity != 1.0, isTemplateInstance, mapObject.propertyChanged(MapObject::OpacityProperty)))
+        w.writeAttribute(QStringLiteral("opacity"), QString::number(opacity));
+
     if (shouldWrite(!mapObject.isVisible(), isTemplateInstance, mapObject.propertyChanged(MapObject::VisibleProperty)))
         w.writeAttribute(QStringLiteral("visible"), QLatin1String(mapObject.isVisible() ? "1" : "0"));
 
diff --git a/src/libtiled/minimaprenderer.cpp b/src/libtiled/minimaprenderer.cpp
index de7e125578..b3bfadff64 100644
--- a/src/libtiled/minimaprenderer.cpp
+++ b/src/libtiled/minimaprenderer.cpp
@@ -203,6 +203,8 @@ void MiniMapRenderer::renderToImage(QImage &image, RenderFlags renderFlags) cons
                             painter.translate(-origin);
                         }
 
+                        painter.setOpacity(object->opacity());
+
                         mRenderer->drawMapObject(&painter, object, object->effectiveColors());
 
                         if (object->rotation() != qreal(0))
diff --git a/src/libtiled/varianttomapconverter.cpp b/src/libtiled/varianttomapconverter.cpp
index 2c2b9bf3b5..fdb5a2c75a 100644
--- a/src/libtiled/varianttomapconverter.cpp
+++ b/src/libtiled/varianttomapconverter.cpp
@@ -722,6 +722,7 @@ std::unique_ptr<MapObject> VariantToMapConverter::toMapObject(const QVariantMap
     const qreal width = variantMap[QStringLiteral("width")].toReal();
     const qreal height = variantMap[QStringLiteral("height")].toReal();
     const qreal rotation = variantMap[QStringLiteral("rotation")].toReal();
+    const qreal opacity = variantMap[QStringLiteral("opacity")].toReal();
 
     QString className = variantMap[QStringLiteral("class")].toString();
     if (className.isEmpty())    // fallback for compatibility
@@ -738,6 +739,11 @@ std::unique_ptr<MapObject> VariantToMapConverter::toMapObject(const QVariantMap
         object->setPropertyChanged(MapObject::RotationProperty);
     }
 
+    if (variantMap.contains(QLatin1String("opacity"))) {
+        object->setOpacity(opacity);
+        object->setPropertyChanged(MapObject::OpacityProperty);
+    }
+
     if (!templateVariant.isNull()) { // This object is a template instance
         QString templateFileName = resolvePath(mDir, templateVariant);
         auto objectTemplate = TemplateManager::instance()->loadObjectTemplate(templateFileName);
diff --git a/src/plugins/lua/luaplugin.cpp b/src/plugins/lua/luaplugin.cpp
index e8d53b2d37..36493cc773 100644
--- a/src/plugins/lua/luaplugin.cpp
+++ b/src/plugins/lua/luaplugin.cpp
@@ -730,6 +730,7 @@ void LuaWriter::writeMapObject(const Tiled::MapObject *mapObject)
     mWriter.writeKeyAndValue("width", mapObject->width());
     mWriter.writeKeyAndValue("height", mapObject->height());
     mWriter.writeKeyAndValue("rotation", mapObject->rotation());
+    mWriter.writeKeyAndValue("opacity", mapObject->opacity());
 
     if (!mapObject->cell().isEmpty())
         mWriter.writeKeyAndValue("gid", mGidMapper.cellToGid(mapObject->cell()));
diff --git a/src/plugins/python/pythonbind.cpp b/src/plugins/python/pythonbind.cpp
index 18d5f5cb3d..8613c0637c 100644
--- a/src/plugins/python/pythonbind.cpp
+++ b/src/plugins/python/pythonbind.cpp
@@ -6985,6 +6985,18 @@ _wrap_PyTiledMapObject_objectGroup(PyTiledMapObject *self, PyObject *PYBINDGEN_U
 }
 
 
+PyObject *
+_wrap_PyTiledMapObject_opacity(PyTiledMapObject *self, PyObject *PYBINDGEN_UNUSED(_args), PyObject *PYBINDGEN_UNUSED(_kwargs))
+{
+    PyObject *py_retval;
+    double retval;
+
+    retval = self->obj->opacity();
+    py_retval = Py_BuildValue((char *) "d", retval);
+    return py_retval;
+}
+
+
 PyObject *
 _wrap_PyTiledMapObject_rotation(PyTiledMapObject *self, PyObject *PYBINDGEN_UNUSED(_args), PyObject *PYBINDGEN_UNUSED(_kwargs))
 {
@@ -7049,6 +7061,23 @@ _wrap_PyTiledMapObject_setName(PyTiledMapObject *self, PyObject *args, PyObject
 }
 
 
+PyObject *
+_wrap_PyTiledMapObject_setOpacity(PyTiledMapObject *self, PyObject *args, PyObject *kwargs)
+{
+    PyObject *py_retval;
+    double opacity;
+    const char *keywords[] = {"opacity", NULL};
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, (char *) "d", (char **) keywords, &opacity)) {
+        return NULL;
+    }
+    self->obj->setOpacity(opacity);
+    Py_INCREF(Py_None);
+    py_retval = Py_None;
+    return py_retval;
+}
+
+
 PyObject *
 _wrap_PyTiledMapObject_setPosition(PyTiledMapObject *self, PyObject *args, PyObject *kwargs)
 {
@@ -7271,10 +7300,12 @@ static PyMethodDef PyTiledMapObject_methods[] = {
     {(char *) "isVisible", (PyCFunction) _wrap_PyTiledMapObject_isVisible, METH_NOARGS, "isVisible()\n\n" },
     {(char *) "name", (PyCFunction) _wrap_PyTiledMapObject_name, METH_NOARGS, "name()\n\n" },
     {(char *) "objectGroup", (PyCFunction) _wrap_PyTiledMapObject_objectGroup, METH_NOARGS, "objectGroup()\n\n" },
+    {(char *) "opacity", (PyCFunction) _wrap_PyTiledMapObject_opacity, METH_NOARGS, "opacity()\n\n" },
     {(char *) "rotation", (PyCFunction) _wrap_PyTiledMapObject_rotation, METH_NOARGS, "rotation()\n\n" },
     {(char *) "setCell", (PyCFunction) _wrap_PyTiledMapObject_setCell, METH_KEYWORDS|METH_VARARGS, "setCell(c)\n\ntype: c: Tiled::Cell const" },
     {(char *) "setHeight", (PyCFunction) _wrap_PyTiledMapObject_setHeight, METH_KEYWORDS|METH_VARARGS, "setHeight(h)\n\ntype: h: double" },
     {(char *) "setName", (PyCFunction) _wrap_PyTiledMapObject_setName, METH_KEYWORDS|METH_VARARGS, "setName(n)\n\ntype: n: QString" },
+    {(char *) "setOpacity", (PyCFunction) _wrap_PyTiledMapObject_setOpacity, METH_KEYWORDS|METH_VARARGS, "setOpacity(opacity)\n\ntype: opacity: double" },
     {(char *) "setPosition", (PyCFunction) _wrap_PyTiledMapObject_setPosition, METH_KEYWORDS|METH_VARARGS, "setPosition(pos)\n\ntype: pos: QPointF" },
     {(char *) "setRotation", (PyCFunction) _wrap_PyTiledMapObject_setRotation, METH_KEYWORDS|METH_VARARGS, "setRotation(r)\n\ntype: r: double" },
     {(char *) "setShape", (PyCFunction) _wrap_PyTiledMapObject_setShape, METH_KEYWORDS|METH_VARARGS, "setShape(s)\n\ntype: s: Tiled::MapObject::Shape" },
diff --git a/src/plugins/python/tiledbinding.py b/src/plugins/python/tiledbinding.py
index 2901f270aa..084e11a065 100755
--- a/src/plugins/python/tiledbinding.py
+++ b/src/plugins/python/tiledbinding.py
@@ -280,6 +280,8 @@ def _decorate(obj, *args, **kwargs):
 cls_mapobject.add_method('objectGroup', retval('Tiled::ObjectGroup*',reference_existing_object=True), [])
 cls_mapobject.add_method('rotation', 'double', [])
 cls_mapobject.add_method('setRotation', None, [('double','r')])
+cls_mapobject.add_method('opacity', 'double', [])
+cls_mapobject.add_method('setOpacity', None, [('double','opacity')])
 cls_mapobject.add_method('isVisible', 'bool', [])
 cls_mapobject.add_method('setVisible', None, [('bool','v')])
 cls_mapobject.add_method('name', 'QString', [])
diff --git a/src/tiled/editablemapobject.cpp b/src/tiled/editablemapobject.cpp
index 23e67ec53f..537432176f 100644
--- a/src/tiled/editablemapobject.cpp
+++ b/src/tiled/editablemapobject.cpp
@@ -190,6 +190,11 @@ void EditableMapObject::setRotation(qreal rotation)
     setMapObjectProperty(MapObject::RotationProperty, rotation);
 }
 
+void EditableMapObject::setOpacity(qreal opacity)
+{
+    setMapObjectProperty(MapObject::OpacityProperty, opacity);
+}
+
 void EditableMapObject::setVisible(bool visible)
 {
     setMapObjectProperty(MapObject::VisibleProperty, visible);
diff --git a/src/tiled/editablemapobject.h b/src/tiled/editablemapobject.h
index a43b971f1f..68c2e5a302 100644
--- a/src/tiled/editablemapobject.h
+++ b/src/tiled/editablemapobject.h
@@ -63,6 +63,7 @@ class EditableMapObject : public EditableObject
     Q_PROPERTY(qreal height READ height WRITE setHeight)
     Q_PROPERTY(QSizeF size READ size WRITE setSize)
     Q_PROPERTY(qreal rotation READ rotation WRITE setRotation)
+    Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)
     Q_PROPERTY(bool visible READ isVisible WRITE setVisible)
     Q_PROPERTY(QJSValue polygon READ polygon WRITE setPolygon)
     Q_PROPERTY(QString text READ text WRITE setText)
@@ -114,6 +115,7 @@ class EditableMapObject : public EditableObject
     qreal height() const;
     QSizeF size() const;
     qreal rotation() const;
+    qreal opacity() const;
     bool isVisible() const;
     QJSValue polygon() const;
     QString text() const;
@@ -149,6 +151,7 @@ public slots:
     void setHeight(qreal height);
     void setSize(QSizeF size);
     void setRotation(qreal rotation);
+    void setOpacity(qreal opacity);
     void setVisible(bool visible);
     void setPolygon(QJSValue polygon);
     void setPolygon(const QPolygonF &polygon);
@@ -219,6 +222,11 @@ inline qreal EditableMapObject::rotation() const
     return mapObject()->rotation();
 }
 
+inline qreal EditableMapObject::opacity() const
+{
+    return mapObject()->opacity();
+}
+
 inline bool EditableMapObject::isVisible() const
 {
     return mapObject()->isVisible();
diff --git a/src/tiled/mapobjectitem.cpp b/src/tiled/mapobjectitem.cpp
index 70c679fecb..f44a1e6352 100644
--- a/src/tiled/mapobjectitem.cpp
+++ b/src/tiled/mapobjectitem.cpp
@@ -89,6 +89,7 @@ void MapObjectItem::syncWithMapObject()
 
     setPos(pixelPos);
     setRotation(mObject->rotation());
+    setOpacity(mObject->opacity());
 
     if (mBoundingRect != bounds) {
         // Notify the graphics scene about the geometry change in advance
diff --git a/src/tiled/propertybrowser.cpp b/src/tiled/propertybrowser.cpp
index 511a33eee1..bc511dc122 100644
--- a/src/tiled/propertybrowser.cpp
+++ b/src/tiled/propertybrowser.cpp
@@ -839,6 +839,11 @@ void PropertyBrowser::addMapObjectProperties()
     bool isPoint = mapObject->shape() == MapObject::Point;
     addProperty(RotationProperty, QMetaType::Double, tr("Rotation"), groupProperty)->setEnabled(!isPoint);
 
+    QtVariantProperty *opacityProperty = addProperty(OpacityProperty, QMetaType::Double, tr("Opacity"), groupProperty);
+    opacityProperty->setAttribute(QLatin1String("minimum"), 0.0);
+    opacityProperty->setAttribute(QLatin1String("maximum"), 1.0);
+    opacityProperty->setAttribute(QLatin1String("singleStep"), 0.1);
+
     if (mMapObjectFlags & ObjectHasTile) {
         QtVariantProperty *flippingProperty =
                 addProperty(FlippingProperty, VariantPropertyManager::flagTypeId(),
@@ -1296,6 +1301,12 @@ QUndoCommand *PropertyBrowser::applyMapObjectValueTo(PropertyId id, const QVaria
                                           val.toDouble());
         }
         break;
+    case OpacityProperty:{
+        command = new ChangeMapObject(mDocument, mapObject,
+                                      MapObject::OpacityProperty,
+                                      val.toReal());
+        break;
+    }
     case FlippingProperty: {
         const int flippingFlags = val.toInt();
 
@@ -1905,6 +1916,7 @@ void PropertyBrowser::updateProperties()
         }
 
         mIdToProperty[RotationProperty]->setValue(mapObject->rotation());
+        mIdToProperty[OpacityProperty]->setValue(mapObject->opacity());
 
         if (flags & ObjectHasTile) {
             int flippingFlags = 0;
diff --git a/src/tmxrasterizer/tmxrasterizer.cpp b/src/tmxrasterizer/tmxrasterizer.cpp
index 05b081fca6..eff40eee06 100644
--- a/src/tmxrasterizer/tmxrasterizer.cpp
+++ b/src/tmxrasterizer/tmxrasterizer.cpp
@@ -85,6 +85,8 @@ void TmxRasterizer::drawMapLayers(const MapRenderer &renderer,
                         painter.translate(-origin);
                     }
 
+                    painter.setOpacity(object->opacity());
+
                     renderer.drawMapObject(&painter, object, object->effectiveColors());
 
                     if (object->rotation() != qreal(0))
diff --git a/src/tmxviewer/tmxviewer.cpp b/src/tmxviewer/tmxviewer.cpp
index e00ea748ef..4a741fc83f 100644
--- a/src/tmxviewer/tmxviewer.cpp
+++ b/src/tmxviewer/tmxviewer.cpp
@@ -65,6 +65,7 @@ class MapObjectItem : public QGraphicsItem
 
         setPos(pixelPos);
         setRotation(mapObject->rotation());
+        setOpacity(mapObject->opacity());
     }
 
     QRectF boundingRect() const override