Merge branch 'Unity-2017.3' of https://github.com/Unity-Technologies/ScriptableRenderLoop into Unity-2017.3

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/LitData.hlsl

 {
     float maxDisplacement = 0.0;
 #if defined(_HEIGHTMAP)
-    maxDisplacement = _HeightAmplitude;
+    maxDisplacement = abs(_HeightAmplitude); // _HeightAmplitude can be negative if min and max are inverted, but the max displacement must be positive
 #endif
     return maxDisplacement;
 }
 {
     float maxDisplacement = 0.0;
 
+    // _HeightAmplitudeX can be negative if min and max are inverted, but the max displacement must be positive, take abs()
-    maxDisplacement = _HeightAmplitude0;
+    maxDisplacement = abs(_HeightAmplitude0);
-    maxDisplacement = max(  _HeightAmplitude1
+    maxDisplacement = max(  abs(_HeightAmplitude1)
-                            +_HeightAmplitude0 * _InheritBaseHeight1
+                            + abs(_HeightAmplitude0) * _InheritBaseHeight1
                             #endif
                             , maxDisplacement);
 #endif
-    maxDisplacement = max(  _HeightAmplitude2
+    maxDisplacement = max(  abs(_HeightAmplitude2)
-                            +_HeightAmplitude0 * _InheritBaseHeight2
+                            + abs(_HeightAmplitude0) * _InheritBaseHeight2
                             #endif
                             , maxDisplacement);
 #endif
 #if defined(_HEIGHTMAP3)
-    maxDisplacement = max(  _HeightAmplitude3
+    maxDisplacement = max(  abs(_HeightAmplitude3)
-                            +_HeightAmplitude0 * _InheritBaseHeight3
+                            + abs(_HeightAmplitude0) * _InheritBaseHeight3
                             #endif
                             , maxDisplacement);
 #endif
     // (baseColor - meanColor) + lerp(meanColor, baseColor0, inheritBaseColor) simplify to
     // saturate(influenceFactor * (baseColor0 - meanColor) + baseColor);
     // There is a special case when baseColor < meanColor to avoid getting negative values.
-    float3 factor = baseColor > meanColor ? (baseColor0 - meanColor) : (baseColor0 * baseColor / meanColor - baseColor);
+    float3 factor = baseColor > meanColor ? (baseColor0 - meanColor) : (baseColor0 * baseColor / max(meanColor, 0.001) - baseColor); // max(to avoid divide by 0)
     return influenceFactor * factor + baseColor;
 }
 

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/LitDataInternal.hlsl

 
     // Apply tiling options
     ADD_IDX(layerTexCoord.base).uv = TRANSFORM_TEX(uvBase, ADD_IDX(_BaseColorMap));
-    ADD_IDX(layerTexCoord.details).uv = TRANSFORM_TEX(uvDetails, ADD_IDX(_DetailMap));
+    // Detail map tiling option inherit from the tiling of the base
+    ADD_IDX(layerTexCoord.details).uv = TRANSFORM_TEX(TRANSFORM_TEX(uvDetails, ADD_IDX(_BaseColorMap)), ADD_IDX(_DetailMap));
-
-    ADD_IDX(layerTexCoord.details).uvXZ = TRANSFORM_TEX(uvXZ, ADD_IDX(_DetailMap));
-    ADD_IDX(layerTexCoord.details).uvXY = TRANSFORM_TEX(uvXY, ADD_IDX(_DetailMap));
-    ADD_IDX(layerTexCoord.details).uvZY = TRANSFORM_TEX(uvZY, ADD_IDX(_DetailMap));
+    
+    ADD_IDX(layerTexCoord.details).uvXZ = TRANSFORM_TEX(TRANSFORM_TEX(uvXZ, ADD_IDX(_BaseColorMap)), ADD_IDX(_DetailMap));
+    ADD_IDX(layerTexCoord.details).uvXY = TRANSFORM_TEX(TRANSFORM_TEX(uvXY, ADD_IDX(_BaseColorMap)), ADD_IDX(_DetailMap));
+    ADD_IDX(layerTexCoord.details).uvZY = TRANSFORM_TEX(TRANSFORM_TEX(uvZY, ADD_IDX(_BaseColorMap)), ADD_IDX(_DetailMap));
 
     #ifdef SURFACE_GRADIENT
     // This part is only relevant for normal mapping with UV_MAPPING_UVSET