Changed normal of the ground to GL, Now the normal mapping is correct.

media/textures/pbr-512/pavingStones/PavingStones046_2K-JPG.mtlx

@@ -0,0 +1,36 @@
+<?xml version="1.0"?>
+<materialx version="1.39" fileprefix="./">
+  <open_pbr_surface type="surfaceshader" ypos="-1.879310" name="PavingStones046_2K_JPG_OpenPbrSurface" xpos="6.159420">
+    <input type="color3" name="base_color" nodename="PavingStones046_2K_JPG_Color" />
+    <input type="vector3" name="geometry_normal" nodename="NormalMap" />
+    <input type="float" name="specular_roughness" nodename="PavingStones046_2K_JPG_Roughness" />
+  </open_pbr_surface>
+  <surfacematerial type="material" ypos="0.000000" name="PavingStones046_2K_JPG" xpos="8.695652">
+    <input type="surfaceshader" name="surfaceshader" nodename="PavingStones046_2K_JPG_OpenPbrSurface" />
+    <input type="displacementshader" name="displacementshader" nodename="displacement" />
+  </surfacematerial>
+  <tiledimage type="color3" ypos="-3.103448" name="PavingStones046_2K_JPG_Color" xpos="3.623188">
+    <input type="filename" name="file" colorspace="srgb_texture" value="PavingStones046_2K-JPG_Color.jpg" />
+    <input type="vector2" name="uvtiling" value="1.0, 1.0" />
+  </tiledimage>
+  <tiledimage type="float" ypos="5.163793" name="PavingStones046_2K_JPG_Displacement" xpos="3.623188">
+    <input type="filename" name="file" value="PavingStones046_2K-JPG_Displacement.jpg" />
+    <input type="vector2" name="uvtiling" value="1.0, 1.0" />
+  </tiledimage>
+  <displacement type="displacementshader" ypos="1.879310" name="displacement" xpos="6.159420">
+    <input type="float" name="displacement" nodename="PavingStones046_2K_JPG_Displacement" />
+    <input type="float" name="scale" value="1.0" />
+  </displacement>
+  <tiledimage type="vector3" ypos="0.879310" name="PavingStones046_2K_JPG_NormalGL" xpos="1.086957">
+    <input type="filename" name="file" value="PavingStones046_2K-JPG_NormalGL.jpg" />
+    <input type="vector2" name="uvtiling" value="1.0, 1.0" />
+  </tiledimage>
+  <normalmap type="vector3" ypos="3.586207" name="NormalMap" xpos="3.623188">
+    <input type="vector3" name="in" nodename="PavingStones046_2K_JPG_NormalGL" />
+    <input type="float" name="scale" value="1.0" />
+  </normalmap>
+  <tiledimage type="float" ypos="-0.413793" name="PavingStones046_2K_JPG_Roughness" xpos="3.623188">
+    <input type="filename" name="file" value="PavingStones046_2K-JPG_Roughness.jpg" />
+    <input type="vector2" name="uvtiling" value="1.0, 1.0" />
+  </tiledimage>
+</materialx>

media/textures/pbr-512/pavingStones/PavingStones046_2K-JPG.tres

@@ -0,0 +1,19 @@
+[gd_resource type="StandardMaterial3D" load_steps=6 format=3 uid="acg_0wl6yudb"]
+
+[ext_resource type="Texture2D" uid="uid://acg_qwdu613c" id="Color" path="./PavingStones046_2K-JPG_Color.jpg"]
+[ext_resource type="Texture2D" uid="uid://acg_l5d9bi73" id="AmbientOcclusion" path="./PavingStones046_2K-JPG_AmbientOcclusion.jpg"]
+[ext_resource type="Texture2D" uid="uid://acg_ad0vlmbp" id="Displacement" path="./PavingStones046_2K-JPG_Displacement.jpg"]
+[ext_resource type="Texture2D" uid="uid://acg_iu7w0s8l" id="Roughness" path="./PavingStones046_2K-JPG_Roughness.jpg"]
+[ext_resource type="Texture2D" uid="uid://acg_nby48io6" id="NormalGL" path="./PavingStones046_2K-JPG_NormalGL.jpg"]
+[resource]
+albedo_texture = ExtResource("Color")
+ao_enabled = true
+ao_texture = ExtResource("AmbientOcclusion")
+ao_texture_channel = 4
+roughness_texture = ExtResource("Roughness")
+roughness_texture_channel = 4
+normal_texture = ExtResource("NormalGL")
+normal_enabled = true
+heightmap_texture = ExtResource("Displacement")
+heightmap_scale = 1.0
+heightmap_enabled = true