Unity Keyline: Outline, Highlight, X-Ray, Fill · URP HDRP 2D 3D

Add one component. Assign a profile. The object has an outline. Same setup for a mesh and for a sprite. Your material is never touched.

Try the full 1.2.0 package in the browser — no download:
https://unitycraft.org/4ssets/demo/keyline/

Also on the Unity Asset Store (Package Manager updates):
https://assetstore.unity.com/packages/slug/397306

What it does

Keyline is a per-object outline, highlight, fill and X-Ray tool for Unity. It draws from a separate hull with its own material, so Lit, Shader Graph, a third-party toon shader, or a character with a stack of custom passes all keep working. Remove the component and the object is byte-for-byte what it was.

It is not a fullscreen edge detector. You can outline one enemy through a wall in orange while a pickup two metres away pulses green. Everything without the component stays untouched.

What's new in 1.2.0

• Sprites — Keyline Outline 2D gives a SpriteRenderer the same profiles, styles and passes. The rim is measured from a distance field baked out of the artwork, holes included.
• Pixel art — the field is baked on the texel grid. Square corners, an edge on texel boundaries, width counted in whole texels at any zoom and any Pixels Per Unit. 8-way or 4-way corners.
• Five new styles — Lava, Smoke, Crystal, Water, Fire. Fifteen in total.
• Blend modes per pass — Alpha, Additive, Multiply, Screen, Lighten, Darken, Subtract, or the style's default.
• X-Ray layer filtering — each object names the layers its X-Ray may show through: glass only, walls only, both.
• Single Layer, edge softness, uniform scale, Draw Config.

Features

• Four independent passes per object: rim, X-Ray rim, fill, X-Ray fill (plus an optional cutout overlay on meshes)
• 15 tunable styles: Solid, Neon, Halo, Sketch, Pattern, Double, Electric, Rainbow, Gradient, Frost, Lava, Smoke, Crystal, Water, Fire
• Hard-mesh handling — Mixed expand and Sheet Solidify, so foliage cards, planes and thin prongs keep a real rim instead of turning into blades
• Cutout from material alpha, double-sided on every style and pass
• Merge groups as one silhouette, X-Ray unions across the group
• Skinned meshes follow the animation without re-baking per frame
• Width in world units, constant screen pixels, or texels
• 13 drop-in components: hover, selection, damage, gauges, waves, reveal
• Full scripting API, documented in the manual
• URP 17 and HDRP 17 in one package, selected by the pipeline tag. No renderer feature for a hard edge. Optional Soft Edge pass, one click on, one click off. A Light shader profile for mobile.

Requirements

• Unity 6000.3 or newer
• URP 17 or HDRP 17
• Built-in Render Pipeline is not supported
• Tested on Windows, Android (Vulkan / OpenGLES3) and WebGL

Links

• Live demo: https://unitycraft.org/4ssets/demo/keyline120/
• Manual & Quick Start: https://unitycraft.org/4ssets/docs/keyline/
• Asset Store: https://assetstore.unity.com/packages/slug/397306
• Discussions: Unity Discussions
• Trailer: https://www.youtube.com/watch?v=V1XMKGdm60o
• Support: support@unitycraft.org

Made by 4ssets, part of UnityCraft.org.