(Feat) Add build

Assets/GAME/Shaders/Build/BuildGhost.shader

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+Shader "GAME/BuildGhost"
+{
+    Properties
+    {
+        [Header(Ghost Tint   set to green when placeable   red when blocked)][Space]
+        [HDR] _BaseColor("Ghost Color", Color) = (0.2, 1.0, 0.35, 1)
+        _FillOpacity("Fill Opacity (body see through amount)", Range(0,1)) = 0.15
+
+        [Header(Fresnel Rim   glowing silhouette edge)][Space]
+        _RimPower("Rim Power (higher = thinner edge)", Range(0.5,12)) = 2.5
+        _RimIntensity("Rim Intensity", Range(0,8)) = 2.5
+
+        [Header(Scan Pulse   gentle breathing glow)][Space]
+        _PulseSpeed("Pulse Speed", Float) = 2.5
+        _PulseMin("Pulse Min", Range(0,2)) = 0.7
+        _PulseMax("Pulse Max", Range(0,2)) = 1.15
+
+        [Header(Rendering)][Space]
+        [Enum(UnityEngine.Rendering.CullMode)] _Cull("Cull", Float) = 2
+    }
+
+    SubShader
+    {
+        Tags
+        {
+            "RenderType" = "Transparent"
+            "RenderPipeline" = "UniversalPipeline"
+            "Queue" = "Transparent"
+            "IgnoreProjector" = "True"
+        }
+
+        // Shared declarations for every pass.
+        HLSLINCLUDE
+        #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+        CBUFFER_START(UnityPerMaterial)
+            half4  _BaseColor;
+            half   _FillOpacity;
+            half   _RimPower;
+            half   _RimIntensity;
+            float  _PulseSpeed;
+            half   _PulseMin;
+            half   _PulseMax;
+        CBUFFER_END
+        ENDHLSL
+
+        // =====================================================================
+        //  Ghost — unlit, additive-ish transparent body with a bright fresnel
+        //  rim so the silhouette reads clearly. The whole look is driven by the
+        //  single _BaseColor tint, so placement code just swaps green <-> red.
+        // =====================================================================
+        Pass
+        {
+            Name "Ghost"
+            Tags { "LightMode" = "UniversalForward" }
+
+            Blend SrcAlpha OneMinusSrcAlpha
+            ZWrite Off
+            ZTest LEqual
+            Cull [_Cull]
+
+            HLSLPROGRAM
+            #pragma target 3.0
+            #pragma vertex GhostVertex
+            #pragma fragment GhostFragment
+            #pragma multi_compile_instancing
+            #pragma multi_compile_fog
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float3 normalOS   : NORMAL;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float3 positionWS : TEXCOORD0;
+                half3  normalWS   : TEXCOORD1;
+                float  fogFactor  : TEXCOORD2;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+                UNITY_VERTEX_OUTPUT_STEREO
+            };
+
+            Varyings GhostVertex(Attributes IN)
+            {
+                Varyings OUT = (Varyings)0;
+                UNITY_SETUP_INSTANCE_ID(IN);
+                UNITY_TRANSFER_INSTANCE_ID(IN, OUT);
+                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
+
+                VertexPositionInputs posInput = GetVertexPositionInputs(IN.positionOS.xyz);
+                VertexNormalInputs normalInput = GetVertexNormalInputs(IN.normalOS);
+
+                OUT.positionCS = posInput.positionCS;
+                OUT.positionWS = posInput.positionWS;
+                OUT.normalWS = normalInput.normalWS;
+                OUT.fogFactor = ComputeFogFactor(posInput.positionCS.z);
+                return OUT;
+            }
+
+            half4 GhostFragment(Varyings IN) : SV_Target
+            {
+                UNITY_SETUP_INSTANCE_ID(IN);
+                UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(IN);
+
+                half3 normalWS = normalize(IN.normalWS);
+                half3 viewDirWS = normalize(GetWorldSpaceViewDir(IN.positionWS));
+
+                // Fresnel rim: bright on grazing angles so the edge glows.
+                half fresnel = pow(1.0 - saturate(dot(normalWS, viewDirWS)), _RimPower);
+                half rim = fresnel * _RimIntensity;
+
+                // Breathing pulse so the ghost feels alive without moving.
+                half pulse = lerp(_PulseMin, _PulseMax, sin(_Time.y * _PulseSpeed) * 0.5 + 0.5);
+
+                half3 color = _BaseColor.rgb * pulse;
+                half alpha = saturate(_FillOpacity + rim) * pulse * _BaseColor.a;
+
+                color = MixFog(color, IN.fogFactor);
+                return half4(color, saturate(alpha));
+            }
+            ENDHLSL
+        }
+    }
+
+    FallBack Off
+}

Assets/GAME/Shaders/Build/BuildGhost.shader.meta

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Assets/GAME/Shaders/Build/GAME_BuildGhost_Good.mat

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Assets/GAME/Shaders/Build/GAME_BuildGhost_Not.mat

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