Fix Undo/Redo Stability for Light Temperature (1304176, 1301076) (#3079)

* Fixed Render Graph immediate mode. (#3033)

Co-authored-by: Sebastien Lagarde <sebastien@unity3d.com>

* Fix issue with shadow mask and area lights (#3019)

* Not checking NdotL since it's not really valid for area lights (We have multiple valid light directions, not one)

* Changelog

Co-authored-by: sebastienlagarde <sebastien@unity3d.com>

* Fix issue with capture callback (now includes post processing results) (#3035)

Co-authored-by: sebastienlagarde <sebastien@unity3d.com>

* [HDRP] Fix decal draw order for ShaderGraph decal materials (#3018)

* Fixed ShaderGraph decal draw order

* Updated changelog

Co-authored-by: sebastienlagarde <sebastien@unity3d.com>

* Fixed various Look Dev issues after exiting Playmode (#2956)

* Fixed access to invalid Contexts references after exiting playmode.

* Fixed comparison gizmo after playmode.

* Fixes from PR feedback

* StackLit: Fix SG surface option property block to only display energy conserving specular color option for the specular input parametrization (similar to case 1257050) (#3060)

* Fixed missing BeginCameraRendering call for custom render mode of a Camera (#3063)

* Implement custom drawer for layer mask parameters (#3066)

* Adding mixed light baking shadowmask test (#3052)

* adding a shadow mask test

* Update reference images

* Apply the fix

* Changelog

* Update CHANGELOG.md

* fix merge issue

Co-authored-by: JulienIgnace-Unity <julien@unity3d.com>
Co-authored-by: Sebastien Lagarde <sebastien@unity3d.com>
Co-authored-by: FrancescoC-unity <43168857+FrancescoC-unity@users.noreply.github.com>
Co-authored-by: Pavlos Mavridis <pavlos.mavridis@unity3d.com>
Co-authored-by: Antoine Lelievre <antoinel@unity3d.com>
Co-authored-by: slunity <37302815+slunity@users.noreply.github.com>
Co-authored-by: Adrien de Tocqueville <adrien.tocqueville@unity3d.com>
Co-authored-by: Rémi Chapelain <57442369+remi-chapelain@users.noreply.github.com>

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed XR depth copy when using MSAA.
 - Fixed after post process custom pass scale issue when dynamic resolution is enabled (case 1299194).
 - Fixed an issue with light intensity prefab override application not visible in the inspector (case 1299563).
+- Fixed Undo/Redo instability of light temperature.
 
 ### Changed
 - Change the source value for the ray tracing frame index iterator from m_FrameCount to the camera frame count (case 1301356).

com.unity.render-pipelines.high-definition/Editor/Lighting/LightUnit/LightUnitSlider.cs

@@ -569,12 +569,14 @@ void SliderWithTextureNoTextField(Rect rect, ref float value, Vector2 range, Lig
             // Draw the exponential slider that fits 6500K to the white point on the gradient texture.
             var internalValue = GUI.HorizontalSlider(rect, ValueToSlider(value), 0f, 1f, SliderStyles.k_TemperatureBorder, SliderStyles.k_TemperatureThumb);
 
-            // Map the value back into kelvin.
-            value = SliderToValue(internalValue);
-
             // Round to nearest since so much precision is not necessary for kelvin while sliding.
             if (EditorGUI.EndChangeCheck())
+            {
+                // Map the value back into kelvin.
+                value = SliderToValue(internalValue);
+
                 value = Mathf.Round(value);
+            }
         }
     }