diff --git a/libs/selectionlib.h b/libs/selectionlib.h
index 5f0a248f5f..3cdba36518 100644
--- a/libs/selectionlib.h
+++ b/libs/selectionlib.h
@@ -4,6 +4,7 @@
 #include "iselection.h"
 #include "ibrush.h"
 #include "igroupnode.h"
+#include "iselectiongroup.h"
 #include "iscenegraph.h"
 #include "ientity.h"
 #include "ipatch.h"
@@ -222,4 +223,30 @@ inline bool curSelectionIsSuitableForReparent()
 	return true;
 }
 
+// Replaces the group assignments of the given node with the given groups
+inline void assignNodeToSelectionGroups(const scene::INodePtr& node, const IGroupSelectable::GroupIds& groups)
+{
+    auto groupSelectable = std::dynamic_pointer_cast<IGroupSelectable>(node);
+    
+    if (!groupSelectable)
+    {
+        return;
+    }
+    
+    const auto& groupIds = groupSelectable->getGroupIds();
+
+    auto previousGroups = groupSelectable->getGroupIds();
+
+    for (auto id : previousGroups)
+    {
+        groupSelectable->removeFromGroup(id);
+    }
+
+    // Add one by one, keeping the order intact
+    for (auto id : groupIds)
+    {
+        groupSelectable->addToGroup(id);
+    }
+}
+
 } // namespace selection
diff --git a/radiantcore/patch/algorithm/General.cpp b/radiantcore/patch/algorithm/General.cpp
index f71634817a..c959fdb787 100644
--- a/radiantcore/patch/algorithm/General.cpp
+++ b/radiantcore/patch/algorithm/General.cpp
@@ -314,7 +314,13 @@ void weldPatches(const PatchNodePtr& patchNode1, const PatchNodePtr& patchNode2)
     patchNode1->getParent()->addChildNode(mergedPatch);
 
     mergedPatch->assignToLayers(patchNode1->getLayers());
-    // TODO: selection grouping
+
+    auto patch1GroupSelectable = std::dynamic_pointer_cast<IGroupSelectable>(patchNode1);
+
+    if (patch1GroupSelectable)
+    {
+        selection::assignNodeToSelectionGroups(mergedPatch, patch1GroupSelectable->getGroupIds());
+    }
 
     std::dynamic_pointer_cast<IPatchNode>(mergedPatch)->getPatch().scaleTextureNaturally();
 
diff --git a/test/PatchWelding.cpp b/test/PatchWelding.cpp
index c13aa44b6e..803b29a212 100644
--- a/test/PatchWelding.cpp
+++ b/test/PatchWelding.cpp
@@ -2,6 +2,7 @@
 
 #include "icommandsystem.h"
 #include "iselection.h"
+#include "iselectiongroup.h"
 #include "ipatch.h"
 #include "algorithm/Scene.h"
 #include "scenelib.h"
@@ -24,7 +25,7 @@ inline scene::INodePtr findPatchWithNumber(const std::string& number)
     return algorithm::findFirstPatchWithMaterial(GlobalMapModule().getRoot(), "textures/numbers/" + number);
 }
 
-void performPatchWeldingTest(const std::string& number1, const std::string& number2, int expectedRows, int expectedCols)
+scene::INodePtr performPatchWelding(const std::string& number1, const std::string& number2)
 {
     auto firstPatch = findPatchWithNumber(number1);
     auto secondPatch = findPatchWithNumber(number2);
@@ -41,7 +42,12 @@ void performPatchWeldingTest(const std::string& number1, const std::string& numb
     EXPECT_FALSE(firstPatch->getParent());
     EXPECT_FALSE(secondPatch->getParent());
 
-    auto merged = std::dynamic_pointer_cast<IPatchNode>(GlobalSelectionSystem().ultimateSelected());
+    return GlobalSelectionSystem().ultimateSelected();
+}
+
+void verifyPatchDimensions(const scene::INodePtr& mergedPatchNode, int expectedRows, int expectedCols)
+{
+    auto merged = std::dynamic_pointer_cast<IPatchNode>(mergedPatchNode);
     EXPECT_EQ(merged->getPatch().getHeight(), expectedRows);
     EXPECT_EQ(merged->getPatch().getWidth(), expectedCols);
 }
@@ -78,7 +84,7 @@ TEST_P(PatchWelding3x3, WeldWithOther3x3Patch)
     auto expectedRows = std::get<2>(GetParam());
     auto expectedColumns = std::get<3>(GetParam());
 
-    performPatchWeldingTest(firstPatch, secondPatch, expectedRows, expectedColumns);
+    verifyPatchDimensions(performPatchWelding(firstPatch, secondPatch), expectedRows, expectedColumns);
 }
 
 // Patch 1 is sharing its first row
@@ -148,7 +154,43 @@ TEST_F(PatchWeldingTest, WeldStackedCylinders)
     loadMap("weld_patches.mapx");
 
     // Welding the two cylinders produce a 5rows x 9cols patch
-    performPatchWeldingTest("11", "12", 5, 9);
+    verifyPatchDimensions(performPatchWelding("11", "12"), 5, 9);
+}
+
+TEST_F(PatchWeldingTest, WeldedPatchInheritsLayers)
+{
+    loadMap("weld_patches.mapx");
+
+    auto firstPatch = findPatchWithNumber("1");
+    auto firstPatchLayers = firstPatch->getLayers();
+
+    // Check the setup
+    EXPECT_EQ(firstPatchLayers, scene::LayerList({ 0, 1 })) << "Patch 1 doesn't have the layers it's expected to, test map changed?";
+
+    // Patch 1 has layers (Default,2), Patch 2 has Layer 2 only
+    // After merging we expect the merged patch to have the layers as patch 1 had
+    auto mergedNode = performPatchWelding("1", "2");
+
+    EXPECT_EQ(mergedNode->getLayers(), firstPatchLayers);
+}
+
+TEST_F(PatchWeldingTest, WeldedPatchInheritsSelectionGroups)
+{
+    loadMap("weld_patches.mapx");
+
+    auto firstPatch = findPatchWithNumber("1");
+
+    auto firstPatchSelectionGroup = std::dynamic_pointer_cast<IGroupSelectable>(firstPatch);
+    auto firstPatchGroups = firstPatchSelectionGroup->getGroupIds();
+
+    // Check the setup
+    //EXPECT_EQ(firstPatch, scene::LayerList({ 0, 1 })) << "Patch 1 doesn't have the layers it's expected to, test map changed?";
+
+    // After merging we expect the merged patch to have the same groups as patch 1 had
+    auto mergedNode = performPatchWelding("1", "2");
+    auto mergedNodeSelectionGroup = std::dynamic_pointer_cast<IGroupSelectable>(firstPatch);
+    
+    EXPECT_EQ(mergedNodeSelectionGroup->getGroupIds(), firstPatchGroups);
 }
 
 }