Changing Building Colors in a 3D Object Scene Layer on Unity

[Fizum]

Hi everyone,

I’m working with a 3D Object Scene Layer in Unity (HDRP), and I’m trying to change the color of buildings based on a specific property of the layer. However, all buildings keep the same color, and I can’t figure out what’s causing the issue.

Possible causes I’ve considered:

• The data I’m passing might be incorrect..
• The issue might be with the shader.
• There could be a problem with how the layer is handled.

Has anyone encountered a similar issue or has suggestions on how to debug this?
Thanks in advance for the help.

The first code block shows how I assign the material to the layer, while the second one is the shader code and at the moment the building color is always _FilteredColor.

        var layerAttributes = ArcGISImmutableArray<String>.CreateBuilder();
        layerAttributes.Add("CODICE");
        layer.SetAttributesToVisualize(layerAttributes.MoveToArray());
        layer.MaterialReference = customMaterial;

Shader "HDRP/FilteredBuildings"
{
    Properties
    {
        _BaseColor ("Base Color", Color) = (0,0,1,1)
        _FilteredColor ("Filtered Color", Color) = (1,0,0,1) 
        [HideInInspector]_CODICE ("CODICE", Float) = 0
    }
    HLSLINCLUDE
    #include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
    #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
    ENDHLSL

    SubShader
    {
        Tags { "RenderPipeline"="HDRenderPipeline" }
        Pass
        {
            Name "Forward"
            Tags { "LightMode"="ForwardOnly" }

            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariablesFunctions.hlsl"

            struct Attributes
            {
                float3 positionOS : POSITION;
                float CODICE : TEXCOORD0;
            };

            struct Varyings
            {
                float4 positionCS : SV_POSITION;
                float CODICE : TEXCOORD0;
            };

            float4 _BaseColor;
            float4 _FilteredColor;

            Varyings vert (Attributes IN)
            {
                Varyings OUT;
                OUT.positionCS = TransformObjectToHClip(IN.positionOS);
                OUT.CODICE = IN.CODICE;
                return OUT;
            }
             
            float4 frag (Varyings IN) : SV_Target
            {
                return (IN.CODICE == 0) ? _FilteredColor  : _BaseColor ;
            }
            ENDHLSL
        }
    }
}