diff --git a/src/openrct2-ui/interface/LandTool.cpp b/src/openrct2-ui/interface/LandTool.cpp
index 62765f009d..834d2d3383 100644
--- a/src/openrct2-ui/interface/LandTool.cpp
+++ b/src/openrct2-ui/interface/LandTool.cpp
@@ -65,6 +65,7 @@ void LandTool::ShowSurfaceStyleDropdown(rct_window* w, rct_widget* widget, uint8
     for (size_t i = 0; i < MAX_TERRAIN_SURFACE_OBJECTS; i++)
     {
         const auto surfaceObj = static_cast<TerrainSurfaceObject*>(objManager.GetLoadedObject(ObjectType::TerrainSurface, i));
+        // NumImagesLoaded can be 1 for RCT1 surfaces if the user does not have RCT1 linked.
         if (surfaceObj != nullptr && surfaceObj->NumImagesLoaded > 1)
         {
             gDropdownItemsFormat[itemIndex] = Dropdown::FormatLandPicker;
diff --git a/src/openrct2/paint/tile_element/Paint.Surface.cpp b/src/openrct2/paint/tile_element/Paint.Surface.cpp
index c9631ceca1..70b3536927 100644
--- a/src/openrct2/paint/tile_element/Paint.Surface.cpp
+++ b/src/openrct2/paint/tile_element/Paint.Surface.cpp
@@ -307,6 +307,7 @@ static uint32_t get_surface_image(
     const paint_session* session, uint8_t index, int32_t offset, uint8_t rotation, int32_t grassLength, bool grid,
     bool underground)
 {
+    // Provide fallback for RCT1 surfaces if the user does have RCT1 linked.
     if (!is_csg_loaded() && index >= TERRAIN_RCT2_COUNT)
     {
         if (index == TERRAIN_ROOF_GREY)