#### [Ollin](../../../index.md) → [Examples](../../index.md) → [3D](../index.md) → Effects
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## Effects
| [](ambientocclusion.md) | [](atmosphere.md) | [](contactshadows.md) | [](frameinterpolation.md) |
|---|---|---|---|
| [AmbientOcclusion](ambientocclusion.md) | [Atmosphere](atmosphere.md) | [ContactShadows](contactshadows.md) | [FrameInterpolation](frameinterpolation.md) |
| [](lensflare.md) | [](motionblur.md) | [](pathtraced.md) | [](raytracedreflections.md) |
| [LensFlare](lensflare.md) | [MotionBlur](motionblur.md) | [PathTraced](pathtraced.md) | [RayTracedReflections](raytracedreflections.md) |
| [](scenedefocus.md) | [](screenspacereflections.md) | [](specularantialias.md) | [](temporalaa.md) |
| [SceneDefocus](scenedefocus.md) | [ScreenSpaceReflections](screenspacereflections.md) | [SpecularAntialias](specularantialias.md) | [TemporalAA](temporalaa.md) |
| [](upscaling.md) | [](volumes.md) | | |
| [Upscaling](upscaling.md) | [Volumes](volumes.md) | | |
This group covers the scene-wide realism passes over the 3D frame.
| Sketch | What it shows |
| --- | --- |
| [SceneDefocus](scenedefocus.md) | Depth of field on a 3D scene, defocused by its own depth buffer. A row of orbs is drawn into a render target, then `scene.combined(with: scene.depth, .defocus(...))` racks focus through them. Drag to rack focus by hand. |
| [AmbientOcclusion](ambientocclusion.md) | Screen-space ambient occlusion from the scene's own depth and normals. It adds the soft darkening in crevices and contact gaps that grounds a brightly lit scene. |
| [ScreenSpaceReflections](screenspacereflections.md) | Surfaces reflecting the scene around them. SSR is traced over the frame and shown on a ring of reflective spheres in different metal finishes. |
| [RayTracedReflections](raytracedreflections.md) | Metals mirroring the actual scene, off-screen geometry included and with none of SSR's streaks. Rough surfaces spread their rays for a glossy result, and there is a `reflectionBounces` parameter. Needs a ray-tracing GPU and an environment. |
| [ContactShadows](contactshadows.md) | The fine dark seam that seats an object on the surface it stands on. |
| [Atmosphere](atmosphere.md) | Fog as a cue for distance and height, and physical aerial perspective, both over one colonnade. Hold space to switch. |
| [Volumes](volumes.md) | A column of smoke drawn from a box of density samples, rising past a ball whose shadow cuts a shaft down through it. The `medium` parameter turns it to cloud, fire, ink, or a glowing nebula. |
| [MotionBlur](motionblur.md) | The streak a real camera's open shutter leaves on something moving. |
| [TemporalAA](temporalaa.md) | Edges refined past MSAA by accumulating jittered frames. |
| [SpecularAntialias](specularantialias.md) | Highlights smaller than their pixel, held still instead of crawling. |
| [Upscaling](upscaling.md) | The frame is rendered small and reconstructed at full size, which keeps the frame rate up. |
| [FrameInterpolation](frameinterpolation.md) | The sketch draws half as often, and a generated frame between each pair lets the display keep its rate. |
| [LensFlare](lensflare.md) | The light a camera adds to a picture on its own. |
| [PathTraced](pathtraced.md) | Tune the scene live, then render the same frame offline with a path tracer. |
Run one with `swift run Example-3D-Effects-`, for example `swift run Example-3D-Effects-SceneDefocus`.