Migrate motion blur, TAA, SSAO, and SSR to required components (#15572)

# Objective

Again, a step forward in the migration to required components: a bunch
of camera rendering cormponents!

Note that this does not include the camera components themselves yet,
because the naming and API for `Camera` hasn't been fully decided yet.

## Solution

As per the [selected
proposals](https://hackmd.io/@bevy/required_components/%2FpiqD9GOdSFKZZGzzh3C7Uw):

- Deprecate `MotionBlurBundle` in favor of the `MotionBlur` component
- Deprecate `TemporalAntiAliasBundle` in favor of the
`TemporalAntiAliasing` component
- Deprecate `ScreenSpaceAmbientOcclusionBundle` in favor of the
`ScreenSpaceAmbientOcclusion` component
- Deprecate `ScreenSpaceReflectionsBundle` in favor of the
`ScreenSpaceReflections` component

---

## Migration Guide

`MotionBlurBundle`, `TemporalAntiAliasBundle`,
`ScreenSpaceAmbientOcclusionBundle`, and `ScreenSpaceReflectionsBundle`
have been deprecated in favor of the `MotionBlur`,
`TemporalAntiAliasing`, `ScreenSpaceAmbientOcclusion`, and
`ScreenSpaceReflections` components instead. Inserting them will now
also insert the other components required by them automatically.

crates/bevy_core_pipeline/src/lib.rs

@@ -33,8 +33,8 @@ pub use skybox::Skybox;
 ///
 /// Expect bugs, missing features, compatibility issues, low performance, and/or future breaking changes.
 pub mod experimental {
+    #[expect(deprecated)]
     pub mod taa {
-        #[allow(deprecated)]
         pub use crate::taa::{
             TemporalAntiAliasBundle, TemporalAntiAliasNode, TemporalAntiAliasPlugin,
             TemporalAntiAliasSettings, TemporalAntiAliasing,

crates/bevy_core_pipeline/src/motion_blur/mod.rs

@@ -1,7 +1,8 @@
 //! Per-object, per-pixel motion blur.
 //!
-//! Add the [`MotionBlurBundle`] to a camera to enable motion blur. See [`MotionBlur`] for more
-//! documentation.
+//! Add the [`MotionBlur`] component to a camera to enable motion blur.
+
+#![expect(deprecated)]
 
 use crate::{
     core_3d::graph::{Core3d, Node3d},
@@ -27,6 +28,10 @@ pub mod pipeline;
 
 /// Adds [`MotionBlur`] and the required depth and motion vector prepasses to a camera entity.
 #[derive(Bundle, Default)]
+#[deprecated(
+    since = "0.15.0",
+    note = "Use the `MotionBlur` component instead. Inserting it will now also insert the other components required by it automatically."
+)]
 pub struct MotionBlurBundle {
     pub motion_blur: MotionBlur,
     pub depth_prepass: DepthPrepass,
@@ -51,22 +56,22 @@ pub struct MotionBlurBundle {
 /// # Usage
 ///
 /// Add the [`MotionBlur`] component to a camera to enable and configure motion blur for that
-/// camera. Motion blur also requires the depth and motion vector prepass, which can be added more
-/// easily to the camera with the [`MotionBlurBundle`].
+/// camera.
 ///
 /// ```
-/// # use bevy_core_pipeline::{core_3d::Camera3dBundle, motion_blur::MotionBlurBundle};
+/// # use bevy_core_pipeline::{core_3d::Camera3dBundle, motion_blur::MotionBlur};
 /// # use bevy_ecs::prelude::*;
 /// # fn test(mut commands: Commands) {
 /// commands.spawn((
 ///     Camera3dBundle::default(),
-///     MotionBlurBundle::default(),
+///     MotionBlur::default(),
 /// ));
 /// # }
 /// ````
 #[derive(Reflect, Component, Clone, ExtractComponent, ShaderType)]
 #[reflect(Component, Default)]
 #[extract_component_filter(With<Camera>)]
+#[require(DepthPrepass, MotionVectorPrepass)]
 pub struct MotionBlur {
     /// The strength of motion blur from `0.0` to `1.0`.
     ///

crates/bevy_core_pipeline/src/taa/mod.rs

@@ -1,3 +1,5 @@
+#![expect(deprecated)]
+
 use crate::{
     core_3d::graph::{Core3d, Node3d},
     fullscreen_vertex_shader::fullscreen_shader_vertex_state,
@@ -88,6 +90,10 @@ impl Plugin for TemporalAntiAliasPlugin {
 
 /// Bundle to apply temporal anti-aliasing.
 #[derive(Bundle, Default, Clone)]
+#[deprecated(
+    since = "0.15.0",
+    note = "Use the `TemporalAntiAlias` component instead. Inserting it will now also insert the other components required by it automatically."
+)]
 pub struct TemporalAntiAliasBundle {
     pub settings: TemporalAntiAliasing,
     pub jitter: TemporalJitter,
@@ -119,25 +125,24 @@ pub struct TemporalAntiAliasBundle {
 ///
 /// # Usage Notes
 ///
+/// The [`TemporalAntiAliasPlugin`] must be added to your app.
 /// Any camera with this component must also disable [`Msaa`] by setting it to [`Msaa::Off`].
 ///
-/// Requires that you add [`TemporalAntiAliasPlugin`] to your app,
-/// and add the [`DepthPrepass`], [`MotionVectorPrepass`], and [`TemporalJitter`]
-/// components to your camera.
+/// [Currently](https://github.com/bevyengine/bevy/issues/8423), TAA cannot be used with [`bevy_render::camera::OrthographicProjection`].
 ///
-/// [Currently](https://github.com/bevyengine/bevy/issues/8423) cannot be used with [`bevy_render::camera::OrthographicProjection`].
-///
-/// Does not work well with alpha-blended meshes as it requires depth writing to determine motion.
+/// TAA also does not work well with alpha-blended meshes, as it requires depth writing to determine motion.
 ///
 /// It is very important that correct motion vectors are written for everything on screen.
 /// Failure to do so will lead to ghosting artifacts. For instance, if particle effects
 /// are added using a third party library, the library must either:
+///
 /// 1. Write particle motion vectors to the motion vectors prepass texture
 /// 2. Render particles after TAA
 ///
-/// If no [`MipBias`] component is attached to the camera, TAA will add a MipBias(-1.0) component.
+/// If no [`MipBias`] component is attached to the camera, TAA will add a `MipBias(-1.0)` component.
 #[derive(Component, Reflect, Clone)]
 #[reflect(Component, Default)]
+#[require(TemporalJitter, DepthPrepass, MotionVectorPrepass)]
 #[doc(alias = "Taa")]
 pub struct TemporalAntiAliasing {
     /// Set to true to delete the saved temporal history (past frames).

crates/bevy_pbr/src/ssao/mod.rs

@@ -1,3 +1,5 @@
+#![expect(deprecated)]
+
 use crate::NodePbr;
 use bevy_app::{App, Plugin};
 use bevy_asset::{load_internal_asset, Handle};
@@ -129,6 +131,10 @@ impl Plugin for ScreenSpaceAmbientOcclusionPlugin {
 
 /// Bundle to apply screen space ambient occlusion.
 #[derive(Bundle, Default, Clone)]
+#[deprecated(
+    since = "0.15.0",
+    note = "Use the `ScreenSpaceAmbientOcclusion` component instead. Inserting it will now also insert the other components required by it automatically."
+)]
 pub struct ScreenSpaceAmbientOcclusionBundle {
     pub settings: ScreenSpaceAmbientOcclusion,
     pub depth_prepass: DepthPrepass,
@@ -146,8 +152,7 @@ pub struct ScreenSpaceAmbientOcclusionBundle {
 ///
 /// # Usage Notes
 ///
-/// Requires that you add [`ScreenSpaceAmbientOcclusionPlugin`] to your app,
-/// and add the [`DepthPrepass`] and [`NormalPrepass`] components to your camera.
+/// Requires that you add [`ScreenSpaceAmbientOcclusionPlugin`] to your app.
 ///
 /// It strongly recommended that you use SSAO in conjunction with
 /// TAA ([`bevy_core_pipeline::experimental::taa::TemporalAntiAliasing`]).
@@ -156,6 +161,7 @@ pub struct ScreenSpaceAmbientOcclusionBundle {
 /// SSAO is not supported on `WebGL2`, and is not currently supported on `WebGPU` or `DirectX12`.
 #[derive(Component, ExtractComponent, Reflect, PartialEq, Eq, Hash, Clone, Default, Debug)]
 #[reflect(Component, Debug, Default, Hash, PartialEq)]
+#[require(DepthPrepass, NormalPrepass)]
 #[doc(alias = "Ssao")]
 pub struct ScreenSpaceAmbientOcclusion {
     pub quality_level: ScreenSpaceAmbientOcclusionQualityLevel,

crates/bevy_pbr/src/ssr/mod.rs

@@ -1,5 +1,7 @@
 //! Screen space reflections implemented via raymarching.
 
+#![expect(deprecated)]
+
 use bevy_app::{App, Plugin};
 use bevy_asset::{load_internal_asset, Handle};
 use bevy_core_pipeline::{
@@ -58,6 +60,10 @@ pub struct ScreenSpaceReflectionsPlugin;
 /// A convenient bundle to add screen space reflections to a camera, along with
 /// the depth and deferred prepasses required to enable them.
 #[derive(Bundle, Default)]
+#[deprecated(
+    since = "0.15.0",
+    note = "Use the `ScreenSpaceReflections` components instead. Inserting it will now also insert the other components required by it automatically."
+)]
 pub struct ScreenSpaceReflectionsBundle {
     /// The component that enables SSR.
     pub settings: ScreenSpaceReflections,
@@ -70,8 +76,8 @@ pub struct ScreenSpaceReflectionsBundle {
 /// Add this component to a camera to enable *screen-space reflections* (SSR).
 ///
 /// Screen-space reflections currently require deferred rendering in order to
-/// appear. Therefore, you'll generally need to add a [`DepthPrepass`] and a
-/// [`DeferredPrepass`] to the camera as well.
+/// appear. Therefore, they also need the [`DepthPrepass`] and [`DeferredPrepass`]
+/// components, which are inserted automatically.
 ///
 /// SSR currently performs no roughness filtering for glossy reflections, so
 /// only very smooth surfaces will reflect objects in screen space. You can
@@ -92,6 +98,7 @@ pub struct ScreenSpaceReflectionsBundle {
 /// which is required for screen-space raymarching.
 #[derive(Clone, Copy, Component, Reflect)]
 #[reflect(Component, Default)]
+#[require(DepthPrepass, DeferredPrepass)]
 #[doc(alias = "Ssr")]
 pub struct ScreenSpaceReflections {
     /// The maximum PBR roughness level that will enable screen space

examples/3d/anti_aliasing.rs

@@ -5,15 +5,15 @@ use std::{f32::consts::PI, fmt::Write};
 use bevy::{
     core_pipeline::{
         contrast_adaptive_sharpening::ContrastAdaptiveSharpening,
-        experimental::taa::{
-            TemporalAntiAliasBundle, TemporalAntiAliasPlugin, TemporalAntiAliasing,
-        },
+        experimental::taa::{TemporalAntiAliasPlugin, TemporalAntiAliasing},
         fxaa::{Fxaa, Sensitivity},
+        prepass::{DepthPrepass, MotionVectorPrepass},
         smaa::{Smaa, SmaaPreset},
     },
     pbr::CascadeShadowConfigBuilder,
     prelude::*,
     render::{
+        camera::TemporalJitter,
         render_asset::RenderAssetUsages,
         render_resource::{Extent3d, TextureDimension, TextureFormat},
         texture::{ImageSampler, ImageSamplerDescriptor},
@@ -28,6 +28,13 @@ fn main() {
         .run();
 }
 
+type TaaComponents = (
+    TemporalAntiAliasing,
+    TemporalJitter,
+    DepthPrepass,
+    MotionVectorPrepass,
+);
+
 fn modify_aa(
     keys: Res<ButtonInput<KeyCode>>,
     mut camera: Query<
@@ -51,7 +58,7 @@ fn modify_aa(
         camera = camera
             .remove::<Fxaa>()
             .remove::<Smaa>()
-            .remove::<TemporalAntiAliasBundle>();
+            .remove::<TaaComponents>();
     }
 
     // MSAA
@@ -59,7 +66,7 @@ fn modify_aa(
         camera = camera
             .remove::<Fxaa>()
             .remove::<Smaa>()
-            .remove::<TemporalAntiAliasBundle>();
+            .remove::<TaaComponents>();
 
         *msaa = Msaa::Sample4;
     }
@@ -82,7 +89,7 @@ fn modify_aa(
         *msaa = Msaa::Off;
         camera = camera
             .remove::<Smaa>()
-            .remove::<TemporalAntiAliasBundle>()
+            .remove::<TaaComponents>()
             .insert(Fxaa::default());
     }
 
@@ -115,7 +122,7 @@ fn modify_aa(
         *msaa = Msaa::Off;
         camera = camera
             .remove::<Fxaa>()
-            .remove::<TemporalAntiAliasBundle>()
+            .remove::<TaaComponents>()
             .insert(Smaa::default());
     }
 
@@ -141,7 +148,7 @@ fn modify_aa(
         camera
             .remove::<Fxaa>()
             .remove::<Smaa>()
-            .insert(TemporalAntiAliasBundle::default());
+            .insert(TemporalAntiAliasing::default());
     }
 }
 

examples/3d/motion_blur.rs

@@ -1,11 +1,7 @@
 //! Demonstrates how to enable per-object motion blur. This rendering feature can be configured per
 //! camera using the [`MotionBlur`] component.z
 
-use bevy::{
-    core_pipeline::motion_blur::{MotionBlur, MotionBlurBundle},
-    math::ops,
-    prelude::*,
-};
+use bevy::{core_pipeline::motion_blur::MotionBlur, math::ops, prelude::*};
 
 fn main() {
     let mut app = App::new();
@@ -23,18 +19,15 @@ fn main() {
 fn setup_camera(mut commands: Commands) {
     commands.spawn((
         Camera3dBundle::default(),
-        // Add the MotionBlurBundle to a camera to enable motion blur.
+        // Add the `MotionBlur` component to a camera to enable motion blur.
         // Motion blur requires the depth and motion vector prepass, which this bundle adds.
         // Configure the amount and quality of motion blur per-camera using this component.
-        MotionBlurBundle {
-            motion_blur: MotionBlur {
+        MotionBlur {
             shutter_angle: 1.0,
             samples: 2,
             #[cfg(all(feature = "webgl2", target_arch = "wasm32", not(feature = "webgpu")))]
             _webgl2_padding: Default::default(),
         },
-            ..default()
-        },
     ));
 }
 

examples/3d/scrolling_fog.rs

@@ -13,7 +13,7 @@
 use bevy::{
     core_pipeline::{
         bloom::Bloom,
-        experimental::taa::{TemporalAntiAliasBundle, TemporalAntiAliasPlugin},
+        experimental::taa::{TemporalAntiAliasPlugin, TemporalAntiAliasing},
     },
     pbr::{DirectionalLightShadowMap, FogVolume, VolumetricFog, VolumetricLight},
     prelude::*,
@@ -59,7 +59,7 @@ fn setup(
             msaa: Msaa::Off,
             ..default()
         },
-        TemporalAntiAliasBundle::default(),
+        TemporalAntiAliasing::default(),
         Bloom::default(),
         VolumetricFog {
             ambient_intensity: 0.0,

examples/3d/ssao.rs

@@ -1,12 +1,9 @@
 //! A scene showcasing screen space ambient occlusion.
 
 use bevy::{
-    core_pipeline::experimental::taa::{TemporalAntiAliasBundle, TemporalAntiAliasPlugin},
+    core_pipeline::experimental::taa::{TemporalAntiAliasPlugin, TemporalAntiAliasing},
     math::ops,
-    pbr::{
-        ScreenSpaceAmbientOcclusion, ScreenSpaceAmbientOcclusionBundle,
-        ScreenSpaceAmbientOcclusionQualityLevel,
-    },
+    pbr::{ScreenSpaceAmbientOcclusion, ScreenSpaceAmbientOcclusionQualityLevel},
     prelude::*,
     render::camera::TemporalJitter,
 };
@@ -29,8 +26,8 @@ fn setup(
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
-    commands
-        .spawn(Camera3dBundle {
+    commands.spawn((
+        Camera3dBundle {
             camera: Camera {
                 hdr: true,
                 ..default()
@@ -38,9 +35,10 @@ fn setup(
             transform: Transform::from_xyz(-2.0, 2.0, -2.0).looking_at(Vec3::ZERO, Vec3::Y),
             msaa: Msaa::Off,
             ..default()
-        })
-        .insert(ScreenSpaceAmbientOcclusionBundle::default())
-        .insert(TemporalAntiAliasBundle::default());
+        },
+        ScreenSpaceAmbientOcclusion::default(),
+        TemporalAntiAliasing::default(),
+    ));
 
     let material = materials.add(StandardMaterial {
         base_color: Color::srgb(0.5, 0.5, 0.5),

examples/3d/ssr.rs

@@ -9,7 +9,6 @@ use bevy::{
     math::{vec3, vec4},
     pbr::{
         DefaultOpaqueRendererMethod, ExtendedMaterial, MaterialExtension, ScreenSpaceReflections,
-        ScreenSpaceReflectionsBundle,
     },
     prelude::*,
     render::{
@@ -247,7 +246,7 @@ fn spawn_camera(commands: &mut Commands, asset_server: &AssetServer) {
             brightness: 5000.0,
             ..default()
         })
-        .insert(ScreenSpaceReflectionsBundle::default())
+        .insert(ScreenSpaceReflections::default())
         .insert(Fxaa::default());
 }
 

examples/3d/transmission.rs

@@ -36,9 +36,7 @@ use bevy::{
 };
 
 #[cfg(not(all(feature = "webgl2", target_arch = "wasm32")))]
-use bevy::core_pipeline::experimental::taa::{
-    TemporalAntiAliasBundle, TemporalAntiAliasPlugin, TemporalAntiAliasing,
-};
+use bevy::core_pipeline::experimental::taa::{TemporalAntiAliasPlugin, TemporalAntiAliasing};
 use rand::random;
 
 fn main() {
@@ -324,7 +322,7 @@ fn setup(
             ..default()
         },
         #[cfg(not(all(feature = "webgl2", target_arch = "wasm32")))]
-        TemporalAntiAliasBundle::default(),
+        TemporalAntiAliasing::default(),
         EnvironmentMapLight {
             intensity: 25.0,
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),