Jump flood based outline effect for Unity https://medium.com/@bgolus/the-quest-for-very-wide-outlines-ba82ed442cd9

HiddenJumpFloodOutline.shader

Shader "Hidden/JumpFloodOutline"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
    }
    SubShader
    {
        Tags { "PreviewType" = "Plane" }
        Cull Off ZWrite Off ZTest Always

        CGINCLUDE
        // just inside the precision of a R16G16_SNorm to keep encoded range 1.0 >= and > -1.0
        #define SNORM16_MAX_FLOAT_MINUS_EPSILON ((float)(32768-2) / (float)(32768-1))
        #define FLOOD_ENCODE_OFFSET float2(1.0, SNORM16_MAX_FLOAT_MINUS_EPSILON)
        #define FLOOD_ENCODE_SCALE float2(2.0, 1.0 + SNORM16_MAX_FLOAT_MINUS_EPSILON)

        #define FLOOD_NULL_POS -1.0
        #define FLOOD_NULL_POS_FLOAT2 float2(FLOOD_NULL_POS, FLOOD_NULL_POS)
        ENDCG
        
        Pass // 0
        {
            Name "INNERSTENCIL"

            Stencil {
                Ref 1
                ReadMask 1
                WriteMask 1
                Comp NotEqual
                Pass Replace
            }

            ColorMask 0
            Blend Zero One

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            float4 vert (float4 vertex : POSITION) : SV_POSITION
            {
                return UnityObjectToClipPos(vertex);
            }

            // null frag
            void frag () {}
            ENDCG
        }

        Pass // 1
        {
            Name "BUFFERFILL"

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            struct appdata
            {
                float4 vertex : POSITION;
            };

            float4 vert (appdata v) : SV_POSITION
            {
                float4 pos = UnityObjectToClipPos(v.vertex);

                // flip the rendering "upside down" in non OpenGL to make things easier later
                // you'll notice none of the later passes need to pass UVs
                #ifdef UNITY_UV_STARTS_AT_TOP
                pos.y = -pos.y;
                #endif

                return pos;
            }

            half frag () : SV_Target
            {
                return 1.0;
            }
            ENDCG
        }

        Pass // 2
        {
            Name "JUMPFLOODINIT"

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };

            Texture2D _MainTex;
            float4 _MainTex_TexelSize;

            v2f vert (appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }

            float2 frag (v2f i) : SV_Target {
                // integer pixel position
                int2 uvInt = i.pos.xy;

                // sample silhouette texture for sobel
                half3x3 values;
                UNITY_UNROLL
                for(int u=0; u<3; u++)
                {
                    UNITY_UNROLL
                    for(int v=0; v<3; v++)
                    {
                        uint2 sampleUV = clamp(uvInt + int2(u-1, v-1), int2(0,0), (int2)_MainTex_TexelSize.zw - 1);
                        values[u][v] = _MainTex.Load(int3(sampleUV, 0)).r;
                    }
                }

                // calculate output position for this pixel
                float2 outPos = i.pos.xy * abs(_MainTex_TexelSize.xy) * FLOOD_ENCODE_SCALE - FLOOD_ENCODE_OFFSET;

                // interior, return position
                if (values._m11 > 0.99)
                    return outPos;

                // exterior, return no position
                if (values._m11 < 0.01)
                    return FLOOD_NULL_POS_FLOAT2;

                // sobel to estimate edge direction
                float2 dir = -float2(
                    values[0][0] + values[0][1] * 2.0 + values[0][2] - values[2][0] - values[2][1] * 2.0 - values[2][2],
                    values[0][0] + values[1][0] * 2.0 + values[2][0] - values[0][2] - values[1][2] * 2.0 - values[2][2]
                    );

                // if dir length is small, this is either a sub pixel dot or line
                // no way to estimate sub pixel edge, so output position
                if (abs(dir.x) <= 0.005 && abs(dir.y) <= 0.005)
                    return outPos;

                // normalize direction
                dir = normalize(dir);

                // sub pixel offset
                float2 offset = dir * (1.0 - values._m11);

                // output encoded offset position
                return (i.pos.xy + offset) * abs(_MainTex_TexelSize.xy) * FLOOD_ENCODE_SCALE - FLOOD_ENCODE_OFFSET;
            }
            ENDCG
        }

        Pass // 3
        {
            Name "JUMPFLOOD"

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            struct appdata
            {
                float4 vertex : POSITION;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };

            Texture2D _MainTex;
            float4 _MainTex_TexelSize;
            int _StepWidth;

            v2f vert (appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }

            float2 frag (v2f i) : SV_Target {
                // integer pixel position
                int2 uvInt = int2(i.pos.xy);

                // initialize best distance at infinity
                float bestDist = 1.#INF;
                float2 bestCoord;

                // jump samples
                UNITY_UNROLL
                for(int u=-1; u<=1; u++)
                {
                    UNITY_UNROLL
                    for(int v=-1; v<=1; v++)
                    {
                        // calculate offset sample position
                        int2 offsetUV = uvInt + int2(u, v) * _StepWidth;

                        // .Load() acts funny when sampling outside of bounds, so don't
                        offsetUV = clamp(offsetUV, int2(0,0), (int2)_MainTex_TexelSize.zw - 1);

                        // decode position from buffer
                        float2 offsetPos = (_MainTex.Load(int3(offsetUV, 0)).rg + FLOOD_ENCODE_OFFSET) * _MainTex_TexelSize.zw / FLOOD_ENCODE_SCALE;

                        // the offset from current position
                        float2 disp = i.pos.xy - offsetPos;

                        // square distance
                        float dist = dot(disp, disp);

                        // if offset position isn't a null position or is closer than the best
                        // set as the new best and store the position
                        if (offsetPos.y != FLOOD_NULL_POS && dist < bestDist)
                        {
                            bestDist = dist;
                            bestCoord = offsetPos;
                        }
                    }
                }

                // if not valid best distance output null position, otherwise output encoded position
                return isinf(bestDist) ? FLOOD_NULL_POS_FLOAT2 : bestCoord * _MainTex_TexelSize.xy * FLOOD_ENCODE_SCALE - FLOOD_ENCODE_OFFSET;
            }
            ENDCG
        }

        Pass // 4
        {
            Name "JUMPFLOOD_SINGLEAXIS"

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            struct appdata
            {
                float4 vertex : POSITION;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };

            Texture2D _MainTex;
            float4 _MainTex_TexelSize;
            int2 _AxisWidth;

            v2f vert (appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }

            half2 frag (v2f i) : SV_Target {
                // integer pixel position
                int2 uvInt = int2(i.pos.xy);

                // initialize best distance at infinity
                float bestDist = 1.#INF;
                float2 bestCoord;

                // jump samples
                // only one loop
                UNITY_UNROLL
                for(int u=-1; u<=1; u++)
                {
                    // calculate offset sample position
                    int2 offsetUV = uvInt + _AxisWidth * u;

                    // .Load() acts funny when sampling outside of bounds, so don't
                    offsetUV = clamp(offsetUV, int2(0,0), (int2)_MainTex_TexelSize.zw - 1);

                    // decode position from buffer
                    float2 offsetPos = (_MainTex.Load(int3(offsetUV, 0)).rg + FLOOD_ENCODE_OFFSET) * _MainTex_TexelSize.zw / FLOOD_ENCODE_SCALE;

                    // the offset from current position
                    float2 disp = i.pos.xy - offsetPos;

                    // square distance
                    float dist = dot(disp, disp);

                    // if offset position isn't a null position or is closer than the best
                    // set as the new best and store the position
                    if (offsetPos.x != -1.0 && dist < bestDist)
                    {
                        bestDist = dist;
                        bestCoord = offsetPos;
                    }
                }

                // if not valid best distance output null position, otherwise output encoded position
                return isinf(bestDist) ? FLOOD_NULL_POS_FLOAT2 : bestCoord * _MainTex_TexelSize.xy * FLOOD_ENCODE_SCALE - FLOOD_ENCODE_OFFSET;
            }
            ENDCG
        }

        Pass // 5
        {
            Name "JUMPFLOODOUTLINE"

            Stencil {
                Ref 1
                ReadMask 1
                WriteMask 1
                Comp NotEqual
                Pass Zero
                Fail Zero
            }

            Blend SrcAlpha OneMinusSrcAlpha

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            #pragma target 4.5

            struct appdata
            {
                float4 vertex : POSITION;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
            };

            Texture2D _MainTex;

            half4 _OutlineColor;
            float _OutlineWidth;

            v2f vert (appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }

            half4 frag (v2f i) : SV_Target {
                // integer pixel position
                int2 uvInt = int2(i.pos.xy);

                // load encoded position
                float2 encodedPos = _MainTex.Load(int3(uvInt, 0)).rg;

                // early out if null position
                if (encodedPos.y == -1)
                    return half4(0,0,0,0);

                // decode closest position
                float2 nearestPos = (encodedPos + FLOOD_ENCODE_OFFSET) * abs(_ScreenParams.xy) / FLOOD_ENCODE_SCALE;

                // current pixel position
                float2 currentPos = i.pos.xy;

                // distance in pixels to closest position
                half dist = length(nearestPos - currentPos);

                // calculate outline
                // + 1.0 is because encoded nearest position is half a pixel inset
                // not + 0.5 because we want the anti-aliased edge to be aligned between pixels
                // distance is already in pixels, so this is already perfectly anti-aliased!
                half outline = saturate(_OutlineWidth - dist + 1.0);

                // apply outline to alpha
                half4 col = _OutlineColor;
                col.a *= outline;

                // profit!
                return col;
            }
            ENDCG
        }
    }
}

JumpFloodOutlineRenderer.cs

using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.Experimental.Rendering;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;

//Highlighter tool is just an external static class which stores collections for consumption by the scriptable renderer passes. 
//It is not included due to it being a bad implementation, you should implement some decent way of deciding what is rendered to the highlight

public class JumpFloodOutlineRenderFeature : ScriptableRendererFeature
{
    [ColorUsage(true, true)] public Color OutlineColor = Color.white;
    [Range(0.0f, 1000.0f)] public float OutlinePixelWidth = 4f;
    public bool UseSeparableAxisMethod = true;
    public RenderPassEvent PassEvent = RenderPassEvent.AfterRenderingTransparents;

    public string[] SpecialShaderNames;

    public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
    {
        HighlighterTool.SpecialShaderNames = SpecialShaderNames;
        if (HighlighterTool.DefaultPPKey.Color != OutlineColor) HighlighterTool.UpdateDefaultColor(OutlineColor);

        var values = HighlighterTool.GetSortedPairs();
        foreach (var pp in values)
        {
            if (pp.Renderers.Count == 0) continue;

            pp.OutlinePass.OutlinePixelWidth = OutlinePixelWidth;
            pp.OutlinePass.UseSeparableAxisMethod = UseSeparableAxisMethod;

            pp.FillPass.renderPassEvent = pp.OutlinePass.renderPassEvent = PassEvent;

            renderer.EnqueuePass(pp.FillPass);
            renderer.EnqueuePass(pp.OutlinePass);
        }
    }

    public override void Create()
    {
        HighlighterTool.Create(OutlineColor);
    }
}
public class JFOBufferFillPass : ScriptableRenderPass
{
    const int SHADER_PASS_SILHOUETTE_BUFFER_FILL = 1;

    public HighlighterState PassKey;

    readonly int _meshOcculsionID = Shader.PropertyToID("_MeshOcculsion");

    public override void Configure(CommandBuffer cb, RenderTextureDescriptor cameraTextureDescriptor)
    {
        base.Configure(cb, cameraTextureDescriptor);

        // match current quality settings' MSAA settings
        // doesn't check if current camera has MSAA enabled
        // also could just always do MSAA if you so pleased
        var msaa = Mathf.Max(1, QualitySettings.antiAliasing);

        var rtd = new RenderTextureDescriptor()
        {
            dimension = TextureDimension.Tex2D,
            colorFormat = RenderTextureFormat.R8,

            width = cameraTextureDescriptor.width,
            height = cameraTextureDescriptor.height,

            msaaSamples = msaa,
            depthBufferBits = 0,

            sRGB = false,

            useMipMap = false,
            autoGenerateMips = false
        };
        cb.GetTemporaryRT(_meshOcculsionID, rtd, FilterMode.Point);

        ConfigureTarget(_meshOcculsionID);
        ConfigureClear(ClearFlag.All, Color.clear);
    }

    public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
    {
        //if (!Application.isFocused) return;

        var cb = CommandBufferPool.Get("JFOutline FillPass");
        var cullingMask = renderingData.cameraData.camera.cullingMask;
        //HighlighterTool.DrawRenderers(cb, SHADER_PASS_SILHOUETTE_BUFFER_FILL, PassKey, cullingMask);
        //cb.DrawRenderer over all renderers you want outlined
        cb.SetGlobalTexture(_meshOcculsionID, _meshOcculsionID);

        context.ExecuteCommandBuffer(cb);
        CommandBufferPool.Release(cb);
    }

    public override void FrameCleanup(CommandBuffer cb)
    {
        cb.ReleaseTemporaryRT(_meshOcculsionID);

        base.FrameCleanup(cb);
    }
}

public class JumpFloodOutlinePass : ScriptableRenderPass
{
    const int SHADER_PASS_SILHOUETTE_BUFFER_FILL = 1;
    const int SHADER_PASS_JFA_INIT = 2;
    const int SHADER_PASS_JFA_FLOOD = 3;
    const int SHADER_PASS_JFA_FLOOD_SINGLE_AXIS = 4;
    const int SHADER_PASS_JFA_OUTLINE = 5;
    const int SHADER_PASS_JFA_OUTLINEKEEPINNER = 6;
    const int SHADER_PASS_BLIT = 7;

    public float OutlinePixelWidth;
    public bool UseSeparableAxisMethod;

    public HighlighterState PassKey;

    RenderTargetIdentifier _target;

    readonly int _meshOcculsionID = Shader.PropertyToID("_MeshOcculsion");

    readonly int _silhouetteBufferID = Shader.PropertyToID("_SilhouetteBuffer");
    readonly int _nearestPointID = Shader.PropertyToID("_NearestPoint");
    readonly int _nearestPointPingPongID = Shader.PropertyToID("_NearestPointPingPong");

    readonly int _outlineColorID = Shader.PropertyToID("_OutlineColor");
    readonly int _mousePositionID = Shader.PropertyToID("_MousePosition");
    readonly int _outlineWidthID = Shader.PropertyToID("_OutlineWidth");
    readonly int _stepWidthID = Shader.PropertyToID("_StepWidth");
    readonly int _axisWidthID = Shader.PropertyToID("_AxisWidth");

    public override void OnCameraSetup(CommandBuffer cmd, ref RenderingData renderingData)
    {
        base.OnCameraSetup(cmd, ref renderingData);

        _target = renderingData.cameraData.renderer.cameraColorTarget;
    }

    public override void Configure(CommandBuffer cb, RenderTextureDescriptor cameraTextureDescriptor)
    {
        base.Configure(cb, cameraTextureDescriptor);

        // match current quality settings' MSAA settings
        // doesn't check if current camera has MSAA enabled
        // also could just always do MSAA if you so pleased
        var msaa = Mathf.Max(1, QualitySettings.antiAliasing);

        var silhouetteRTD = new RenderTextureDescriptor()
        {
            dimension = TextureDimension.Tex2D,
            graphicsFormat = GraphicsFormat.R8_UNorm,

            width = cameraTextureDescriptor.width,
            height = cameraTextureDescriptor.height,

            msaaSamples = msaa,
            depthBufferBits = 0,

            sRGB = false,

            useMipMap = false,
            autoGenerateMips = false
        };

        cb.GetTemporaryRT(_silhouetteBufferID, silhouetteRTD, FilterMode.Point);
        // setup descriptor for jump flood render textures
        var jfaRTD = silhouetteRTD;
        jfaRTD.msaaSamples = 1;
        jfaRTD.graphicsFormat = GraphicsFormat.R16G16_SNorm;

        // create jump flood buffers to ping pong between
        cb.GetTemporaryRT(_nearestPointID, jfaRTD, FilterMode.Point);
        cb.GetTemporaryRT(_nearestPointPingPongID, jfaRTD, FilterMode.Point);

        ConfigureTarget(_silhouetteBufferID);
        ConfigureClear(ClearFlag.All, Color.clear);
    }

    public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
    {
        //if (!Application.isFocused) return;

        var mouseViewPortPos = renderingData.cameraData.camera.ScreenToViewportPoint(Input.mousePosition);

        var cb = CommandBufferPool.Get("JumpFloorOutlinePass");
        CreateCommandBuffer(cb, mouseViewPortPos);
        context.ExecuteCommandBuffer(cb);
        CommandBufferPool.Release(cb);
    }

    private void CreateCommandBuffer(CommandBuffer cb, Vector4 mouseViewPortPos)
    {
        //Mesh occlusion buffer contains silhouette already so we dont want to rerender them
        cb.Blit(_meshOcculsionID, _silhouetteBufferID, HighlighterTool.OutlineMat, SHADER_PASS_BLIT);

        // Humus3D wire trick, keep line 1 pixel wide and fade alpha instead of making line smaller
        // slightly nicer looking and no more expensive
        var adjustedOutlineColor = PassKey.Color;
        adjustedOutlineColor.a *= Mathf.Clamp01(OutlinePixelWidth);
        cb.SetGlobalColor(_outlineColorID, adjustedOutlineColor.linear);
        cb.SetGlobalFloat(_outlineWidthID, Mathf.Max(1f, OutlinePixelWidth));
        cb.SetGlobalVector(_mousePositionID, mouseViewPortPos);

        // calculate the number of jump flood passes needed for the current outline width
        // + 1.0f to handle half pixel inset of the init pass and antialiasing
        var numMips = Mathf.CeilToInt(Mathf.Log(OutlinePixelWidth + 1.0f, 2f));
        var jfaIter = numMips - 1;

        // Alan Wolfe's separable axis JFA - https://www.shadertoy.com/view/Mdy3D3
        if (UseSeparableAxisMethod)
        {
            // jfa init
            cb.Blit(_silhouetteBufferID, _nearestPointID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_INIT);

            // jfa flood passes
            for (var i = jfaIter; i >= 0; i--)
            {
                // calculate appropriate jump width for each iteration
                // + 0.5 is just me being cautious to avoid any floating point math rounding errors
                var stepWidth = Mathf.Pow(2, i) + 0.5f;

                // the two separable passes, one axis at a time
                cb.SetGlobalVector(_axisWidthID, new Vector2(stepWidth, 0f));
                cb.Blit(_nearestPointID, _nearestPointPingPongID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_FLOOD_SINGLE_AXIS);
                cb.SetGlobalVector(_axisWidthID, new Vector2(0f, stepWidth));
                cb.Blit(_nearestPointPingPongID, _nearestPointID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_FLOOD_SINGLE_AXIS);
            }
        }
        else // traditional JFA
        {
            // choose a starting buffer so we always finish on the same buffer
            var startBufferID = ( jfaIter % 2 == 0 ) ? _nearestPointPingPongID : _nearestPointID;

            // jfa init
            cb.Blit(_silhouetteBufferID, startBufferID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_INIT);

            // jfa flood passes
            for (var i = jfaIter; i >= 0; i--)
            {
                // calculate appropriate jump width for each iteration
                // + 0.5 is just me being cautious to avoid any floating point math rounding errors
                cb.SetGlobalFloat(_stepWidthID, Mathf.Pow(2, i) + 0.5f);

                // ping pong between buffers
                if (i % 2 == 1)
                    cb.Blit(_nearestPointID, _nearestPointPingPongID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_FLOOD);
                else
                    cb.Blit(_nearestPointPingPongID, _nearestPointID, HighlighterTool.OutlineMat, SHADER_PASS_JFA_FLOOD);
            }
        }

        // jfa decode & outline render
        cb.Blit(_nearestPointID, _target, HighlighterTool.OutlineMat, PassKey.KeepInnerArea ? SHADER_PASS_JFA_OUTLINEKEEPINNER : SHADER_PASS_JFA_OUTLINE);
    }

    public override void FrameCleanup(CommandBuffer cb)
    {
        cb.ReleaseTemporaryRT(_silhouetteBufferID);
        cb.ReleaseTemporaryRT(_nearestPointID);
        cb.ReleaseTemporaryRT(_nearestPointPingPongID);

        base.FrameCleanup(cb);
    }
}

Hi thanks for your great sample!
I wanted to try out your sample shader in my URP project but I couldn't figure out how to implement the HighlighterTool.
If I just want to try out the traditional JFA, should I just use only the JumpFloodOutlinePass??

You need the Feature and the Pass. You can see that the pass draws by using commandBuffer.DrawRenderer, so all the highlighter tool stuff is just a static class that returns an object that holds a reference to both the passes required and the list of renderers the passes are going to draw. I can't really explain further how to implement the handling of this as it's entirely dependant on your project's code and what you require from the highlight. I'll answer any questions you have though!

This comment at the top explains this:
//Highlighter tool is just an external static class that stores collections for consumption by the scriptable renderer passes.
//It is not included due to it being a bad implementation, you should implement some decent way of deciding what is rendered to the highlight

JFOBufferFillPass just draws pixels in a buffer that are going to be used in JumpFloodOutlinePass, this is separated as it's required to have a buffer that contains the initial silloutette so it can be clipped etc.

Thank you so much!!
I'll give it a try! 💪

Hi! Thanks for this translation to URP!

I've almost got it working. Is it possible that the shader is missing some of the passes?
There are only 6 passes (0 to 5) defined in the shader, but the code is using pass 6 and 7:

    const int SHADER_PASS_JFA_OUTLINEKEEPINNER = 6;
    const int SHADER_PASS_BLIT = 7;

I'm getting this error: Invalid pass number (7) for Graphics.Blit (Material "(Unknown material)" with 6 passes)

Thanks!

Could you remove it to avoid confusing people? This is not the complete solution, even if you put static properties into it.

It's not provided as a full implementation, only as a rough draft to be fully implemented. The basic idea is all there. If you have revisions you'd like made I'll accept a PR or further fork

…

On Mon, 12 Sep 2022, 11:36 Maxim Karpov, ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ I cannot say thanks for sharing such an ugly code. Please remove it to avoid confusing people. — Reply to this email directly, view it on GitHub <https://gist.github.com/c56256433801991038c9c40a48fe3002#gistcomment-4298057>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACDZ73HRL2MXMRSBO7O25HLV54BSPANCNFSM42ZKENNQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

What are those SpecialShaderNames? What HighlighterTool does with it?

I don't care about your HighlighterTool. Code needs to be plug and play. What is your purpose of wasting everybodies time. Why do you promote your code on orginal thread