Add new Renderers page

Adds a new page which gives a summary of the three renderers. This page briefly
describes the renderers, gives some guidance on how to choose a renderer. It also
contains a comparison table between the renderers.
Adds an entry in the FAQ which links to this new page.
Adds a note about subsurface scattering limitations to the Standard Material page.
Adjusts some other pages which had incorrect information.

about/faq.rst

@@ -393,6 +393,11 @@ Some new versions are safer to upgrade to than others. In general, whether you
 should upgrade depends on your project's circumstances. See
 :ref:`doc_release_policy_should_i_upgrade_my_project` for more information.
 
+Should I use the Forward+, Mobile, or Compatibility renderer?
+-------------------------------------------------------------
+
+You can find a detailed comparison of the renderers in :ref:`doc_renderers`.
+
 I would like to contribute! How can I get started?
 --------------------------------------------------
 

about/list_of_features.rst

@@ -108,6 +108,8 @@ Rendering
   advanced graphics backend, suited for low-end desktop and mobile platforms.
   Used by default on the web platform.
 
+See :ref:`doc_renderers` for a detailed comparison of the rendering methods.
+
 2D graphics
 -----------
 
@@ -279,7 +281,8 @@ Rendering
   rendered with clustered forward optimizations to decrease their individual cost.
   Clustered rendering also lifts any limits on the number of reflection probes that can be used on a mesh.
 - When using the Forward Mobile backend, up to 8 reflection probes can be displayed per mesh
-  resource.
+  resource. When using the Compatibility renderer, up to 2 reflection probes can
+  be displayed per mesh resource.
 
 **Decals:**
 

tutorials/2d/2d_antialiasing.rst

@@ -55,6 +55,9 @@ nodes, you can use 2D multisample antialiasing instead.
 Multisample antialiasing (MSAA)
 -------------------------------
 
+*This is only available in the Forward+ and Mobile renderers, not the
+Compatibility renderer.*
+
 Before enabling MSAA in 2D, it's important to understand what MSAA will operate
 on. MSAA in 2D follows similar restrictions as in 3D. While it does not
 introduce any blurriness, its scope of application is limited. The main

tutorials/3d/3d_antialiasing.rst

@@ -41,6 +41,8 @@ detailed below.
 Multisample antialiasing (MSAA)
 -------------------------------
 
+*This is available in all renderers.*
+
 This technique is the "historical" way of dealing with aliasing. MSAA is very
 effective on geometry edges (especially at higher levels). MSAA does not
 introduce any blurriness whatsoever.
@@ -83,8 +85,8 @@ Note that alpha antialiasing is not used here:
 Temporal antialiasing (TAA)
 ---------------------------
 
-*This is only available in the Clustered Forward backend, not the Forward Mobile
-or Compatibility backends.*
+*This is only available in the Forward+ renderer, not the Mobile or Compatibility
+renderers.*
 
 Temporal antialiasing works by *converging* the result of previously rendered
 frames into a single, high-quality frame. This is a continuous process that
@@ -115,6 +117,9 @@ Comparison between no antialiasing (left) and TAA (right):
 AMD FidelityFX Super Resolution 2.2 (FSR2)
 ------------------------------------------
 
+*This is only available in the Forward+ renderer, not the Mobile or Compatibility
+renderers.*
+
 Since Godot 4.2, there is built-in support for
 `AMD FidelityFX Super Resolution <https://www.amd.com/en/products/graphics/technologies/fidelityfx/super-resolution.html>`__
 2.2. This is an :ref:`upscaling method <doc_resolution_scaling>`
@@ -148,8 +153,8 @@ Comparison between no antialiasing (left) and FSR2 at native resolution (right):
 Fast approximate antialiasing (FXAA)
 ------------------------------------
 
-*This is only available in the Clustered Forward and Forward Mobile backends,
-not the Compatibility backend.*
+*This is only available in the Forward+ and Mobile renderers, not the Compatibility
+renderer.*
 
 Fast approximate antialiasing is a post-processing antialiasing solution. It is
 faster to run than any other antialiasing technique and also supports
@@ -175,8 +180,7 @@ Comparison between no antialiasing (left) and FXAA (right):
 Supersample antialiasing (SSAA)
 -------------------------------
 
-*This is only available in the Clustered Forward and Forward Mobile backends,
-not the Compatibility backend.*
+*This is available in all renderers.*
 
 Supersampling provides the highest quality of antialiasing possible, but it's
 also the most expensive. It works by shading every pixel in the scene multiple
@@ -216,8 +220,8 @@ Comparison between no antialiasing (left) and various SSAA levels (right):
 Screen-space roughness limiter
 ------------------------------
 
-*This is only available in the Clustered Forward and Forward Mobile backends,
-not the Compatibility backend.*
+*This is only available in the Forward+ and Mobile renderers, not the Compatibility
+renderer.*
 
 This is not an edge antialiasing method, but it is a way of reducing specular
 aliasing in 3D.

tutorials/3d/global_illumination/introduction_to_global_illumination.rst

@@ -121,7 +121,7 @@ In order of performance from fastest to slowest:
   - ReflectionProbes with their update mode set to **Always** are much more
     expensive than probes with their update mode set to **Once** (the default).
     Suited for integrated graphics when using the **Once** update mode.
-    *Available when using the Forward Mobile backend. Will be available in the Compatibility backend in later releases.*
+    *Available in all renderers.*
 
 - **LightmapGI:**
 
@@ -131,30 +131,31 @@ In order of performance from fastest to slowest:
     Directional information can be enabled before baking to improve visuals at
     a small performance cost (and at the cost of larger file sizes).
     Suited for integrated graphics.
-    *Available when using the Forward Mobile backend. Will be available in the Compatibility backend in later releases.*
+    *Available in all renderers. However, baking lightmaps requires hardware
+    with RenderingDevice support.*
 
 - **VoxelGI:**
 
   - The bake's number of subdivisions can be adjusted to balance between performance and quality.
     The VoxelGI rendering quality can be adjusted in the Project Settings.
     The rendering can optionally be performed at half resolution
     (and then linearly scaled) to improve performance significantly.
-    **Not available** *when using the Forward Mobile or Compatibility backends.*
+    **Not available** *when using the Mobile or Compatibility renderers.*
 
 - **Screen-space indirect lighting (SSIL):**
 
   - The SSIL quality and number of blur passes can be adjusted in the Project Settings.
     By default, SSIL rendering is performed at half resolution (and then linearly scaled)
     to ensure a reasonable performance level.
-    **Not available** *when using the Forward Mobile or Compatibility backends.*
+    **Not available** *when using the Mobile or Compatibility renderers.*
 
 - **SDFGI:**
 
   - The number of cascades can be adjusted to balance performance and quality.
     The number of rays thrown per frame can be adjusted in the Project Settings.
     The rendering can optionally be performed at half resolution
     (and then linearly scaled) to improve performance significantly.
-    **Not available** *when using the Forward Mobile or Compatibility backends.*
+    **Not available** *when using the Mobile or Compatibility renderers.*
 
 Visuals
 ^^^^^^^

tutorials/3d/standard_material_3d.rst

@@ -468,6 +468,8 @@ mapping.
 Subsurface Scattering
 ---------------------
 
+*This is only available in the Forward+ renderer, not the Mobile or Compatibility
+renderers.*
 
 This effect emulates light that penetrates an object's surface, is scattered,
 and then comes out. It is useful to create realistic skin, marble, colored

tutorials/rendering/index.rst

@@ -11,3 +11,4 @@ Rendering
    multiple_resolutions
    jitter_stutter
    compositor
+   renderers