Refactor : NiloToon 셀프 섀도우 double-draw 제거

이전 fix는 cullResults 기반 DrawRendererList + manual DrawRenderer 둘 다
호출해서 캐릭터가 frustum 안에 있을 때 shadow map에 두 번 그려졌음.
manual draw가 cullResults에 의존하지 않으므로 DrawRendererList 자체가
불필요. 제거하여 GPU 부하 ~절반 감소 + 코드 단순화.

- RG path: PassData.rendererListHandle, RendererListParams,
  CreateRendererList, UseRendererList, DrawRendererList 모두 제거
- Legacy path: cullingParameters/cullResults 계산, context.Cull,
  context.DrawRenderers 모두 제거 (terrainCrashSafeGuard 분기 자체가
  무의미해짐)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Assets/NiloToonURP/Runtime/RendererFeatures/Passes/NiloToonCharSelfShadowMapRTPass.cs

@@ -615,43 +615,7 @@ namespace NiloToon.NiloToonURP
                     }
 #endif
 
-                    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+                    // Streamingle: cullResults / custom culling 코드 제거. manual DrawRenderer가 cullResults에 의존하지 않으므로 불필요.
-                    // set culling for shadow camera -> do culling
-                    ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////               
-                    camera.TryGetCullingParameters(out var cullingParameters);
-
-                    // update culling matrix
-                    cullingParameters.cullingMatrix = shadowCamProjectionMatrix * shadowCamViewMatrix;
-
-                    // update culling planes
-                    GeometryUtility.CalculateFrustumPlanes(cullingParameters.cullingMatrix, cameraPlanes);
-                    for (int i = 0; i < cameraPlanes.Length; i++)
-                    {
-                        cullingParameters.SetCullingPlane(i, cameraPlanes[i]);
-                    }
-
-                    CullingResults cullResults;
-
-                    bool terrainExist = false;
-                    if (settings.terrainCrashSafeGuard)
-                    {
-                        terrainExist = Terrain.activeTerrains.Length != 0;
-                    }
-                    if (settings.perfectCullingForShadowCasters && !terrainExist)
-                    {
-                        // use the above new cullResults in DrawRenderers() below, 
-                        // so even a renderer is not visible in the perspective of main camera,
-                        // it can still render correctly in shadow camera's perspective due to this new culling
-
-                        // (2021-07-14) unity will crash if code running this line and terrain exist in scene
-                        // (2024-03-21) enable this will make VLB's SRP batcher mode flicker randomly, not sure why, should we do something to revert this culling line?
-                        cullResults = context.Cull(ref cullingParameters); // original working code, but will crash if terrain exist
-                    }
-                    else
-                    {
-                        // (2021-07-14) a special temp fix to avoid terrain crashing unity, but will make shadow culling not always correctly if shadow caster is not existing on screen
-                        cullResults = renderingData.cullResults;
-                    }
 
                     ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                     // Set uniform (before context.DrawRenderers)
@@ -721,16 +685,9 @@ namespace NiloToon.NiloToonURP
                     */
 
                     ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-                    // draw all char renderer using SRP batching (must set all uniforms and executed before draw!)
+                    // Streamingle: cullResults 의존성 완전 제거. context.DrawRenderers + custom culling 모두 제거.
+                    // characterList의 모든 NiloToon 캐릭터를 manual draw로 그려 카메라 frustum 무관하게 shadow map 채움.
                     ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-                    ShaderTagId shaderTagId = new ShaderTagId("NiloToonSelfShadowCaster");
-                    var drawSetting = CreateDrawingSettings(shaderTagId, ref renderingData, SortingCriteria.CommonOpaque);
-                    var filterSetting = new FilteringSettings(RenderQueueRange.opaque);
-                    context.DrawRenderers(cullResults, ref drawSetting, ref filterSetting); // using custom cullResults from shadow camera's perspective, instead of main camera's cull result
-
-                    // Streamingle: cullResults 우회용 manual draw.
-                    // perfectCullingForShadowCasters=false 또는 terrain 존재 시 cullResults가 main camera cull로 fallback →
-                    // 캐릭터가 frustum 밖이면 shadow map에 안 그려짐. 같은 renderer가 두 번 그려질 수 있으나 depth test가 처리.
                     DrawNiloToonCharsManuallyLegacy(cmd);
                     context.ExecuteCommandBuffer(cmd);
                     cmd.Clear();
@@ -832,8 +789,7 @@ namespace NiloToon.NiloToonURP
         // copy and edit of https://docs.unity3d.com/6000.0/Documentation/Manual/urp/render-graph-draw-objects-in-a-pass.html
         private class PassData
         {
-            // Create a field to store the list of objects to draw
+            // Streamingle: RendererListHandle 제거. manual DrawRenderer로 대체됨.
-            public RendererListHandle rendererListHandle;
             public bool shouldRender;
             public Matrix4x4 _NiloToonSelfShadowWorldToClip;
             public Vector4 _NiloToonSelfShadowParam;
@@ -861,20 +817,9 @@ namespace NiloToon.NiloToonURP
                 UniversalRenderingData renderingData = frameContext.Get<UniversalRenderingData>();
                 UniversalLightData lightData = frameContext.Get<UniversalLightData>();
 
-                SortingCriteria sortFlags = SortingCriteria.CommonOpaque; //cameraData.defaultOpaqueSortFlags;
+                // Streamingle: RendererList 기반 그리기 제거. ExecutePass의 manual DrawRenderer가
-                RenderQueueRange renderQueueRange = RenderQueueRange.opaque;
+                // characterList를 직접 그리므로 cullResults에 의존하는 RendererList는 불필요 + double-draw 방지.
-                FilteringSettings filterSettings = new FilteringSettings(renderQueueRange, ~0);
+                // RendererList CPU 컬링 비용도 절약.
-
-                // Redraw only objects that have their LightMode tag set to "NiloToonSelfShadowCaster" 
-                ShaderTagId shadersToOverride = new ShaderTagId("NiloToonSelfShadowCaster");
-
-                // Create drawing settings
-                DrawingSettings drawSettings = RenderingUtils.CreateDrawingSettings(shadersToOverride, renderingData, cameraData, lightData, sortFlags);
-
-                // Create the list of objects to draw
-                var rendererListParameters = new RendererListParams(renderingData.cullResults, drawSettings, filterSettings);
-
-               
 
                 // create RT (temp)
                 // Create texture properties that match the screen size
@@ -892,8 +837,6 @@ namespace NiloToon.NiloToonURP
                     shouldRender = true;
                 }
 
-                // Convert the list to a list handle that the render graph system can use
-                passData.rendererListHandle = renderGraph.CreateRendererList(rendererListParameters);
                 passData.shouldRender = shouldRender;
 
                 RenderTextureDescriptor renderTextureDescriptor = new RenderTextureDescriptor(shadowMapSize, shadowMapSize, RenderTextureFormat.Shadowmap, 16);
@@ -904,8 +847,6 @@ namespace NiloToon.NiloToonURP
                 // Set the render target as the color and depth textures of the active camera texture
                 UniversalResourceData resourceData = frameContext.Get<UniversalResourceData>();
 
-                builder.UseRendererList(passData.rendererListHandle);
-                
                 //builder.SetRenderAttachment(resourceData.activeColorTexture, 0);
                 builder.SetRenderAttachmentDepth(shadowMapRT, AccessFlags.Write);
 
@@ -1335,13 +1276,8 @@ namespace NiloToon.NiloToonURP
 
             cmd.SetKeyword(GlobalKeyword.Create(_NILOTOON_RECEIVE_SELF_SHADOW_Keyword), true);
 
-            // Draw the objects in the list (uses main camera cullResults — character가 frustum 안일 때만)
+            // Streamingle: cullResults 의존성 완전 제거. manual draw만 사용.
-            cmd.DrawRendererList(data.rendererListHandle);
+            // characterList의 모든 NiloToon 캐릭터를 직접 그려 카메라 frustum 무관하게 shadow map 채움.
-
-            // Streamingle: cullResults 우회용 manual draw.
-            // 카메라가 캐릭터 frustum 밖이면 rendererListHandle에 캐릭터가 없어 shadow map이 비어 그림자 사라짐.
-            // 모든 NiloToon 캐릭터의 모든 NiloToonSelfShadowCaster pass를 수동으로 한 번 더 그려 cullResults 의존성 제거.
-            // 같은 renderer가 두 번 그려질 수 있으나 depth test가 처리하므로 시각적 영향 없음.
             DrawNiloToonCharsManually(cmd);
         }