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47 lines
2.1 KiB
47 lines
2.1 KiB
2 years ago
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Contributed by ToddRivers
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# Unity Sprite Shaders
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An Uber Shader specialised for rendering Sprites in Unity.
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Even though it's designed for Sprites it can be used for a whole range of uses. It supports a wide range of optional shader features that won't effect performance unless they are used.
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It also supports per-pixel effects such as normal maps and diffuse ramping whilst using Vertex Lit rendering.
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### Lighting
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The shaders support lighting using both Forward Rendering and Vertex Lit Rendering.
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Forward rendering is more accurate but is slower and crucially means the sprite has to write to depth using alpha clipping to avoid overdraw.
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Vertex lit means all lighting can be done in one pass meaning full alpha can be used.
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### Normal Mapping
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Normals maps are supported in both lighting modes (in Vertex Lit rendering data for normal mapping is packed into texture channels and then processed per pixel).
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### Blend Modes
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Easily switch between blend modes including pre-multiplied alpha, additive, multiply etc.
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### Rim Lighting
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Camera-space rim lighting is supported in both lighting modes.
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### Diffuse Ramp
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A ramp texture is optionally supported for toon shading effects.
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### Shadows
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Shadows are supported using alpha clipping.
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### Gradient based Ambient lighting
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Both lighting modes support using a gradient for ambient light. In Vertex Lit mode the Spherical Harmonics is approximated from the ground, equator and sky colors.
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### Emission Map
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An optional emission map is supported.
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### Camera Space Normals
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As sprites are 2d their normals will always be constant. The shaders allow you to define a fixed normal in camera space rather than pass through mesh normals.
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This not only saves vertex throughput but means lighting looks less 'flat' for rendering sprites with a perspective camera.
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### Color Adjustment
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The shaders allow optional adjustment of hue / saturation and brightness as well as applying a solid color overlay effect for flashing a sprite to a solid color (eg. for damage effects).
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### Fog
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Fog is optionally supported
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## To Use
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On your object's material click the drop down for shader and select Spine\Sprite\Pixel Lit, Vertex Lit or Unlit.
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