diff --git a/leenkx/blender/lnx/props_ui.py b/leenkx/blender/lnx/props_ui.py
index 9668f99..d9adb2a 100644
--- a/leenkx/blender/lnx/props_ui.py
+++ b/leenkx/blender/lnx/props_ui.py
@@ -2319,7 +2319,10 @@ class LnxGenTerrainButton(bpy.types.Operator):
         node.location = (-200, -200)
         node.inputs[0].default_value = 5.0
         links.new(nodes['Bump'].inputs[2], nodes['_TerrainHeight'].outputs[0])
-        links.new(nodes['Principled BSDF'].inputs[20], nodes['Bump'].outputs[0])
+        if bpy.app.version[0] >= 4:
+            links.new(nodes['Principled BSDF'].inputs[22], nodes['Bump'].outputs[0]) 
+        else:
+            links.new(nodes['Principled BSDF'].inputs[20], nodes['Bump'].outputs[0])
 
         # Create sectors
         root_obj = bpy.data.objects.new("Terrain", None)
@@ -2352,7 +2355,16 @@ class LnxGenTerrainButton(bpy.types.Operator):
             disp_mod.texture.extension = 'EXTEND'
             disp_mod.texture.use_interpolation = False
             disp_mod.texture.use_mipmap = False
-            disp_mod.texture.image = bpy.data.images.load(filepath=scn.lnx_terrain_textures+'/heightmap_' + j + '.png')
+            try:
+                disp_mod.texture.image = bpy.data.images.load(filepath=scn.lnx_terrain_textures+'/heightmap_' + j + '.png')
+            except Exception as e:
+                if i == 0:  # Only show message once
+                    if scn.lnx_terrain_textures.startswith('//') and not bpy.data.filepath:
+                        self.report({'INFO'}, "Generating terrain... Save .blend file and add your heightmaps for each sector in "
+                                   "the \"Bundled\" folder using the format \"heightmap_01.png\", \"heightmap_02.png\", etc.")
+                    else:
+                        self.report({'INFO'}, f"Heightmap not found: {scn.lnx_terrain_textures}/heightmap_{j}.png - using blank image")
+                
             f = 1
             levels = 0
             while f < disp_mod.texture.image.size[0]: