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Add 3D pixel-art render style (pixelation + depth/normal outlines)

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Full-screen URP post effect on the active PC renderer that pixelates the
scene to a fixed low-res grid and draws depth + normal edge-detection
outlines, with color posterization and tone controls, for a stylized
"3D pixel art" look. Runs via Unity's built-in Full Screen Pass feature
(no custom C#); reads camera depth/normals so it applies to DOTS entities
and GameObjects identically.

- PixelOutline.shader/.mat: pixel-snap fill + gamma-space posterize +
  brightness/contrast/saturation + depth/normal outlines. Normal
  threshold tuned high so outlines don't flood small characters.
- PC_Renderer.asset: FullScreenPassRendererFeature (Depth|Normal, after
  post-processing).
- PostFX_Daylight.asset: tonemapping ACES -> Neutral (poppier color).
- Game.unity: brighter base atmosphere (ambient + fog pushed back) and a
  stronger directional key light so the fill reads under the effect.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Luis Gonzalez
2026-07-06 22:30:18 -07:00
parent 401e0a9c02
commit d2203c8aa1
7 changed files with 240 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Assets/Scenes/Game.unity
+7 -7
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@@ -18,11 +18,11 @@ RenderSettings:
m_FogColor: {r: 0.07, g: 0.09, b: 0.1, a: 1}
m_FogMode: 1
m_FogDensity: 0.006
m_LinearFogStart: 26
m_LinearFogEnd: 60
m_LinearFogStart: 55
m_LinearFogEnd: 180
m_AmbientSkyColor: {r: 0.2, g: 0.24, b: 0.29, a: 1}
m_AmbientEquatorColor: {r: 0.15, g: 0.17, b: 0.19, a: 1}
m_AmbientGroundColor: {r: 0.1, g: 0.11, b: 0.12, a: 1}
m_AmbientEquatorColor: {r: 0.36, g: 0.4, b: 0.44, a: 1}
m_AmbientGroundColor: {r: 0.26, g: 0.28, b: 0.3, a: 1}
m_AmbientIntensity: 1
m_AmbientMode: 1
m_SubtractiveShadowColor: {r: 0.42, g: 0.478, b: 0.627, a: 1}
@@ -15468,7 +15468,7 @@ Light:
serializedVersion: 13
m_Type: 1
m_Color: {r: 0.92, g: 0.94, b: 1, a: 1}
m_Intensity: 1.5
m_Intensity: 1.9
m_Range: 10
m_SpotAngle: 30
m_InnerSpotAngle: 21.80208
@@ -63364,9 +63364,9 @@ MonoBehaviour:
m_EditorClassIdentifier: ProjectM.Client::ProjectM.Client.WorldAtmosphereConfig
BoundaryX: 500
BlendHalfWidth: 80
BaseFogColor: {r: 0.07, g: 0.09, b: 0.1, a: 1}
BaseFogColor: {r: 0.4, g: 0.5, b: 0.54, a: 1}
BaseFogDensity: 0.006
BaseAmbientSky: {r: 0.2, g: 0.24, b: 0.29, a: 1}
BaseAmbientSky: {r: 0.46, g: 0.52, b: 0.6, a: 1}
ExpeditionFogColor: {r: 0.8509804, g: 0.54901963, b: 0.22745098, a: 1}
ExpeditionFogDensity: 0.01
ExpeditionAmbientSky: {r: 0.91, g: 0.769, b: 0.604, a: 1}
Assets/Settings/PC_Renderer.asset
+40 -31
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@@ -56,11 +71,14 @@ MonoBehaviour:
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m_DepthPrimingMode: 0
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@@ -84,12 +102,3 @@ MonoBehaviour:
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Assets/_Project/Rendering/PostFX_Daylight.asset
+1 -1
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Assets/_Project/Shaders/PixelOutline.mat
+45
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m_Floats:
- _Brightness: 1.1
- _ColorLevels: 12
- _Contrast: 1.05
- _DepthEdgesEnabled: 1
- _DepthThreshold: 0.08
- _EdgeStrength: 1
- _NormalEdgesEnabled: 1
- _NormalThreshold: 1
- _OutlineThickness: 1
- _PixelHeight: 200
- _PixelateEnabled: 1
- _PosterizeEnabled: 1
- _Saturation: 1.35
m_Colors:
- _OutlineColorInner: {r: 0, g: 0, b: 0, a: 1}
- _OutlineColorOuter: {r: 0, g: 0, b: 0, a: 1}
m_BuildTextureStacks: []
m_AllowLocking: 1
Assets/_Project/Shaders/PixelOutline.mat.meta
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Assets/_Project/Shaders/PixelOutline.shader
+130
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@@ -0,0 +1,130 @@
Shader "Hidden/ProjectM/PixelOutline"
{
Properties
{
_PixelHeight ("Pixel Grid Height", Float) = 200
[ToggleUI] _PosterizeEnabled ("Posterize (banded color)", Float) = 1
_ColorLevels ("Posterize Levels / channel", Range(2,64)) = 12
_Brightness ("Brightness", Range(0.5,2)) = 1.1
_Contrast ("Contrast", Range(0.5,2)) = 1.05
_Saturation ("Saturation", Range(0,2)) = 1.35
_DepthThreshold ("Depth Threshold (relative)", Range(0,1)) = 0.08
_NormalThreshold ("Normal Threshold", Range(0,4)) = 1.0
_OutlineThickness ("Outline Thickness (texels)", Range(0.25,4)) = 1
_EdgeStrength ("Edge Strength", Range(0,1)) = 1
[HDR] _OutlineColorOuter ("Outline Color - Depth/Silhouette", Color) = (0,0,0,1)
[HDR] _OutlineColorInner ("Outline Color - Normal/Detail", Color) = (0,0,0,1)
[ToggleUI] _PixelateEnabled ("Pixelate", Float) = 1
[ToggleUI] _DepthEdgesEnabled ("Depth Edges", Float) = 1
[ToggleUI] _NormalEdgesEnabled ("Normal Edges", Float) = 1
}
SubShader
{
Tags { "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" }
ZWrite Off ZTest Always Cull Off
Pass
{
Name "PixelOutline"
HLSLPROGRAM
#pragma vertex Vert
#pragma fragment Frag
#pragma target 3.5
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareNormalsTexture.hlsl"
#include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl"
CBUFFER_START(UnityPerMaterial)
float _PixelHeight;
float _PosterizeEnabled;
float _ColorLevels;
float _Brightness;
float _Contrast;
float _Saturation;
float _DepthThreshold;
float _NormalThreshold;
float _OutlineThickness;
float _EdgeStrength;
float4 _OutlineColorOuter;
float4 _OutlineColorInner;
float _PixelateEnabled;
float _DepthEdgesEnabled;
float _NormalEdgesEnabled;
CBUFFER_END
float2 SnapUV(float2 uv, float2 res)
{
return (floor(uv * res) + 0.5) / res;
}
half4 Frag(Varyings input) : SV_Target
{
float2 uv = input.texcoord;
// Fixed, square-pixel low-res grid derived from a target grid height.
float aspect = _ScreenParams.x / max(_ScreenParams.y, 1.0);
float2 res = float2(max(_PixelHeight * aspect, 1.0), max(_PixelHeight, 1.0));
bool doPixelate = _PixelateEnabled > 0.5;
float2 sampleUV = doPixelate ? SnapUV(uv, res) : uv;
float2 texel = 1.0 / res;
float2 off = texel * _OutlineThickness;
// Chunky fill: point-sampled scene color at the snapped grid cell.
float3 col = SAMPLE_TEXTURE2D_X(_BlitTexture, sampler_PointClamp, sampleUV).rgb;
col = max(col, 0.0);
// ---- Tone shaping so flat pixel blocks read clearly ----
col *= _Brightness;
col = (col - 0.5) * _Contrast + 0.5;
float luma = dot(col, float3(0.2126, 0.7152, 0.0722));
col = lerp(luma.xxx, col, _Saturation);
col = saturate(col);
// ---- Posterize in perceptual (gamma) space so dark detail survives ----
if (_PosterizeEnabled > 0.5)
{
float levels = max(_ColorLevels, 2.0);
float3 g = pow(col, 1.0 / 2.2);
g = floor(g * levels + 0.5) / levels;
col = pow(saturate(g), 2.2);
}
// ---- Depth edges (outer silhouettes) ----
float d0 = LinearEyeDepth(SampleSceneDepth(sampleUV), _ZBufferParams);
float dL = LinearEyeDepth(SampleSceneDepth(sampleUV - float2(off.x, 0)), _ZBufferParams);
float dR = LinearEyeDepth(SampleSceneDepth(sampleUV + float2(off.x, 0)), _ZBufferParams);
float dD = LinearEyeDepth(SampleSceneDepth(sampleUV - float2(0, off.y)), _ZBufferParams);
float dU = LinearEyeDepth(SampleSceneDepth(sampleUV + float2(0, off.y)), _ZBufferParams);
float depthDiff = abs(d0 - dL) + abs(d0 - dR) + abs(d0 - dU) + abs(d0 - dD);
float depthEdge = step(_DepthThreshold, depthDiff / max(d0, 1e-3)) * _DepthEdgesEnabled;
// ---- Normal edges (inner detail creases) ----
float3 n0 = SampleSceneNormals(sampleUV);
float3 nL = SampleSceneNormals(sampleUV - float2(off.x, 0));
float3 nR = SampleSceneNormals(sampleUV + float2(off.x, 0));
float3 nD = SampleSceneNormals(sampleUV - float2(0, off.y));
float3 nU = SampleSceneNormals(sampleUV + float2(0, off.y));
float ne = (1.0 - saturate(dot(n0, nL))) + (1.0 - saturate(dot(n0, nR)))
+ (1.0 - saturate(dot(n0, nU))) + (1.0 - saturate(dot(n0, nD)));
float normalEdge = step(_NormalThreshold, ne) * _NormalEdgesEnabled;
// Mask inner lines out of silhouette edges to avoid double outlines.
float normalEdgeMasked = normalEdge * (1.0 - depthEdge);
float edge = saturate(depthEdge + normalEdgeMasked) * _EdgeStrength;
float3 lineCol = lerp(_OutlineColorInner.rgb, _OutlineColorOuter.rgb, depthEdge);
float3 outCol = lerp(col, lineCol, edge);
return half4(outCol, 1.0);
}
ENDHLSL
}
}
Fallback Off
}
Assets/_Project/Shaders/PixelOutline.shader.meta
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