Added 5x5 Tent filtering on desktop.

ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs

             noOpShadowMatrix.m33 = (SystemInfo.usesReversedZBuffer) ? 1.0f : 0.0f;
             m_ShadowMatrices[kMaxCascades] = noOpShadowMatrix;
 
-            float invShadowResolution = 0.5f / shadowResolution;
+            float invShadowResolution = 1.0f / m_Asset.ShadowAtlasResolution;
+            float invHalfShadowResolution = 0.5f * invShadowResolution;
-            cmd.SetGlobalVector("_ShadowOffset0", new Vector4(-invShadowResolution, -invShadowResolution, 0.0f, 0.0f));
-            cmd.SetGlobalVector("_ShadowOffset1", new Vector4(invShadowResolution, -invShadowResolution, 0.0f, 0.0f));
-            cmd.SetGlobalVector("_ShadowOffset2", new Vector4(-invShadowResolution,  invShadowResolution, 0.0f, 0.0f));
-            cmd.SetGlobalVector("_ShadowOffset3", new Vector4(invShadowResolution,  invShadowResolution, 0.0f, 0.0f));
+            cmd.SetGlobalVector("_ShadowOffset0", new Vector4(-invHalfShadowResolution, -invHalfShadowResolution, 0.0f, 0.0f));
+            cmd.SetGlobalVector("_ShadowOffset1", new Vector4( invHalfShadowResolution, -invHalfShadowResolution, 0.0f, 0.0f));
+            cmd.SetGlobalVector("_ShadowOffset2", new Vector4(-invHalfShadowResolution,  invHalfShadowResolution, 0.0f, 0.0f));
+            cmd.SetGlobalVector("_ShadowOffset3", new Vector4( invHalfShadowResolution,  invHalfShadowResolution, 0.0f, 0.0f));
+            cmd.SetGlobalVector("_ShadowmapSize", new Vector4(invShadowResolution, invShadowResolution, m_Asset.ShadowAtlasResolution, m_Asset.ShadowAtlasResolution));
         }
 
         private void SetShaderKeywords(CommandBuffer cmd, ref LightData lightData, List<VisibleLight> visibleLights)

ScriptableRenderPipeline/LightweightPipeline/LWRP/ShaderLibrary/Shadows.hlsl

 #define LIGHTWEIGHT_SHADOWS_INCLUDED
 
 #include "CoreRP/ShaderLibrary/Common.hlsl"
+#include "CoreRP/ShaderLibrary/Shadow/ShadowSamplingTent.hlsl"
 
 #define MAX_SHADOW_CASCADES 4
 
 half4 _ShadowOffset2;
 half4 _ShadowOffset3;
 half4 _ShadowData; // (x: shadowStrength)
+half4 _ShadowmapSize; // (xy: width and height, zw: 1/width and 1/height)
+//#define SHADER_API_MOBILE
 inline half SampleShadowmap(float4 shadowCoord)
 {
 #if defined(_SHADOWS_PERSPECTIVE)
+    half attenuation;
+
+#ifdef SHADER_API_MOBILE
     // 4-tap hardware comparison
     half4 attenuation4;
     attenuation4.x = SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, shadowCoord.xyz + _ShadowOffset0.xyz);
-    half attenuation = dot(attenuation4, 0.25);
+    attenuation = dot(attenuation4, 0.25);
+#else
+    real fetchesWeights[9];
+    real2 fetchesUV[9];
+    SampleShadow_ComputeSamples_Tent_5x5(_ShadowmapSize, shadowCoord.xy, fetchesWeights, fetchesUV);
+
+    attenuation  = fetchesWeights[0] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[0].xy, shadowCoord.z));
+    attenuation += fetchesWeights[1] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[1].xy, shadowCoord.z));
+    attenuation += fetchesWeights[2] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[2].xy, shadowCoord.z));
+    attenuation += fetchesWeights[3] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[3].xy, shadowCoord.z));
+    attenuation += fetchesWeights[4] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[4].xy, shadowCoord.z));
+    attenuation += fetchesWeights[5] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[5].xy, shadowCoord.z));
+    attenuation += fetchesWeights[6] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[6].xy, shadowCoord.z));
+    attenuation += fetchesWeights[7] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[7].xy, shadowCoord.z));
+    attenuation += fetchesWeights[8] * SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, real3(fetchesUV[8].xy, shadowCoord.z));
+#endif
-    half attenuation = SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, shadowCoord.xyz);
+    attenuation = SAMPLE_TEXTURE2D_SHADOW(_ShadowMap, sampler_ShadowMap, shadowCoord.xyz);
 #endif
 
     // Apply shadow strength