Update post processing section to include recent 2.5.0 changes.

ChunkyDocs/docs/reference/user_interface/chunky/render_controls/postprocessing.md

@@ -21,14 +21,15 @@ The <samp>Postprocessing</samp> tab contains controls for postprocessing of the
 
     - <samp>Gamma correction</samp>: Perfoms gamma correction only (the most basic tone mapping). 
 
-    - <samp>Hable tone mapping</samp>: Uses John Hable's <a href="http://filmicworlds.com/blog/filmic-tonemapping-operators/" target="_blank">Uncharted 2 tonemapping function</a>. This postprocessing filter is currently missing gamma correction; this will be fixed in a later release. The current implementation of the postprocessing filter may be moved to a plugin later.
+    - <samp>Hable tone mapping</samp>: Uses John Hable's <a href="http://filmicworlds.com/blog/filmic-tonemapping-operators/" target="_blank">Uncharted 2 tonemapping function</a>. {% if extra.chunky < 2_05_00 %}This postprocessing filter is currently missing gamma correction; this will be fixed in a later release. The current implementation of the postprocessing filter may be moved to a plugin later.{% else %}This filter changed its looks in Chunky 2.5.0 when missing gamma correction was added. The previous implementation may be restored as a plugin later.{% endif %} {% if extra.chunky >= 2_05_00 %}The tone mapping curve can be customized and two presets from John Hable's blog and his GDC talk are also available.{% endif %}
 
     - <samp>Tonemap operator 1</samp>: Uses the <a href="http://filmicworlds.com/blog/filmic-tonemapping-operators/" target="_blank">tone mapping formula</a> by Jim Hejl and Richard Burgess-Dawson.
 
- Other postprocessing filters can be added through the use of [plugins](../../../../../plugins/chunky_plugins), such as the [Bloom plugin](../../../../../plugins/plugin_list#bloom-plugin), which adds a postprocessing filter for bloom effects.
+{% if extra.chunky >= 2_05_00 %}
+    - <samp>Unreal Engine 4 Filmic tone mapping</samp>: This is the <a href="https://docs.unrealengine.com/4.26/en-US/RenderingAndGraphics/PostProcessEffects/ColorGrading/" target="_blank">filmic tone mapper from Unreal Engine 4</a>. By default, it is the same as ACES, but it allows customizing the tone mapping curve. To get an idea for the tone mapping curve, check out <a href="https://www.desmos.com/calculator/h8rbdpawxj?lang=de" target="_blank">this graph</a>. The two available presets represent Unreal Engine's default values (ie. ACES tone mapping) and its legacy tonemapper values.
+{% endif %}
 
-!!! info "Upcoming changes"
-    PR #1519 will add the **Unreal Engine 4 Filmic tone mapping** curve, which matches <samp style="font-size: 1em;">ACES filmic tone mapping</samp> by default, but can be configured to customize the tone mapping. It will also be possible to customize the Hable tone mapping parameters.
+ Other postprocessing filters can be added through the use of [plugins](../../../../../plugins/chunky_plugins), such as the [Bloom plugin](../../../../../plugins/plugin_list#bloom-plugin), which adds a postprocessing filter for bloom effects.
 
 The best postprocessing filter to use depends on the scene and the look which you are attempting to achieve.