urp-postprocessing — Claude Code skill: URP post-processing

What urp-postprocessing does

The skill runs pre-flight checks before touching any effect. URP has to be the active pipeline, HDR has to be on for tonemapping, the camera needs renderPostProcessing set to true, the Volume's GameObject layer must sit inside the camera's volumeLayerMask, and the profile needs at least one override with overrideState = true. A missing Main Camera or an inactive URP stops the run.

Effects go onto a VolumeProfile as VolumeComponent overrides through profile.Add<T>(). Every property is a VolumeParameter, so setting a value without flipping overrideState leaves the Volume system ignoring it. For individual effects the skill loads references/effect-reference.md, which lists the properties for bloom, tonemapping, depth of field, vignette and the rest.

All of this runs as C# inside a live Unity Editor through the eval command. That command needs a connected Editor and the com.unity.pipeline package, which the separate unity-cli skill sets up — install it first. eval compiles a statement block rather than a file, so using directives are rejected and types must be written out in full (UnityEngine.Rendering.Volume, not Volume). If eval is absent from the command catalog, there is nothing to run. The project also needs com.unity.render-pipelines.universal at version 14.0.0 or higher.