diff --git a/cura/Scene/SliceableObjectDecorator.py b/cura/Scene/SliceableObjectDecorator.py
index cc611b17af..7ee77795e7 100644
--- a/cura/Scene/SliceableObjectDecorator.py
+++ b/cura/Scene/SliceableObjectDecorator.py
@@ -12,10 +12,6 @@ from UM.View.GL.OpenGL import OpenGL
 from UM.View.GL.Texture import Texture
 
 
-# FIXME: When the texture UV-unwrapping is done, these two values will need to be set to a proper value (suggest 4096 for both).
-TEXTURE_WIDTH = 512
-TEXTURE_HEIGHT = 512
-
 class SliceableObjectDecorator(SceneNodeDecorator):
     def __init__(self) -> None:
         super().__init__()
@@ -25,15 +21,10 @@ class SliceableObjectDecorator(SceneNodeDecorator):
     def isSliceable(self) -> bool:
         return True
 
-    def getPaintTexture(self, create_if_required: bool = True) -> Optional[UM.View.GL.Texture.Texture]:
-        if self._paint_texture is None and create_if_required:
-            self._paint_texture = OpenGL.getInstance().createTexture(TEXTURE_WIDTH, TEXTURE_HEIGHT)
-            image = QImage(TEXTURE_WIDTH, TEXTURE_HEIGHT, QImage.Format.Format_RGB32)
-            image.fill(0)
-            self._paint_texture.setImage(image)
+    def getPaintTexture(self) -> Optional[Texture]:
         return self._paint_texture
 
-    def setPaintTexture(self, texture: UM.View.GL.Texture) -> None:
+    def setPaintTexture(self, texture: Texture) -> None:
         self._paint_texture = texture
 
     def getTextureDataMapping(self) -> Dict[str, tuple[int, int]]:
@@ -42,6 +33,13 @@ class SliceableObjectDecorator(SceneNodeDecorator):
     def setTextureDataMapping(self, mapping: Dict[str, tuple[int, int]]) -> None:
         self._texture_data_mapping = mapping
 
+    def prepareTexture(self, width: int, height: int) -> None:
+        if self._paint_texture is None:
+            self._paint_texture = OpenGL.getInstance().createTexture(width, height)
+            image = QImage(width, height, QImage.Format.Format_RGB32)
+            image.fill(0)
+            self._paint_texture.setImage(image)
+
     def packTexture(self) -> Optional[bytearray]:
         if self._paint_texture is None:
             return None
@@ -60,6 +58,6 @@ class SliceableObjectDecorator(SceneNodeDecorator):
 
     def __deepcopy__(self, memo) -> "SliceableObjectDecorator":
         copied_decorator = SliceableObjectDecorator()
-        copied_decorator.setPaintTexture(copy.deepcopy(self.getPaintTexture(create_if_required = False)))
+        copied_decorator.setPaintTexture(copy.deepcopy(self.getPaintTexture()))
         copied_decorator.setTextureDataMapping(copy.deepcopy(self.getTextureDataMapping()))
         return copied_decorator
diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 730acf4af6..09143dde64 100755
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -153,8 +153,6 @@ class ThreeMFReader(MeshReader):
             # It is only set for the root node of the 3mf file
             mesh_builder.setFileName(file_name)
 
-        mesh_builder.unwrapNewUvs()
-
         mesh_data = mesh_builder.build()
 
         if len(mesh_data.getVertices()):
diff --git a/plugins/PaintTool/PaintTool.qml b/plugins/PaintTool/PaintTool.qml
index 4cbe9d4ade..ef1ac35628 100644
--- a/plugins/PaintTool/PaintTool.qml
+++ b/plugins/PaintTool/PaintTool.qml
@@ -164,17 +164,22 @@ Item
             width: parent.width
             indicatorVisible: false
 
-            from: 1
-            to: 40
-            value: 10
+            from: 10
+            to: 1000
+            value: 200
 
             onPressedChanged: function(pressed)
             {
                 if(! pressed)
                 {
-                    UM.Controller.triggerActionWithData("setBrushSize", shapeSizeSlider.value)
+                    setBrushSize()
                 }
             }
+
+            function setBrushSize()
+            {
+                UM.Controller.triggerActionWithData("setBrushSize", shapeSizeSlider.value)
+            }
         }
 
         //Line between the sections.
@@ -233,5 +238,6 @@ Item
         rowPaintMode.children[0].setMode()
         rowBrushColor.children[1].setColor()
         rowBrushShape.children[1].setShape()
+        shapeSizeSlider.setBrushSize()
     }
 }
diff --git a/plugins/PaintTool/PaintView.py b/plugins/PaintTool/PaintView.py
index 22eb8c55f6..2b0181be70 100644
--- a/plugins/PaintTool/PaintView.py
+++ b/plugins/PaintTool/PaintView.py
@@ -147,6 +147,14 @@ class PaintView(View):
             paint_data_mapping[paint_type] = new_mapping
             node.callDecoration("setTextureDataMapping", paint_data_mapping)
 
+        mesh = node.getMeshData()
+        if not mesh.hasUVCoordinates():
+            texture_width, texture_height = mesh.calculateUnwrappedUVCoordinates(4096)
+            node.callDecoration("prepareTexture", texture_width, texture_height)
+            if hasattr(mesh, OpenGL.VertexBufferProperty):
+                # Force clear OpenGL buffer so that new UV coordinates will be sent
+                delattr(mesh, OpenGL.VertexBufferProperty)
+
         self._current_paint_type = paint_type
         self._current_bits_ranges = paint_data_mapping[paint_type]