From 28ce224caa5fd6556253352584eb564770f10a4c Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Wed, 7 Aug 2024 17:14:31 +0200
Subject: [PATCH] Reduce shadow atlas fragmentation to favor bigger tile sizes

---
 Source/Engine/Renderer/ShadowsPass.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Source/Engine/Renderer/ShadowsPass.cpp b/Source/Engine/Renderer/ShadowsPass.cpp
index 55293a1df..9b65e9c3e 100644
--- a/Source/Engine/Renderer/ShadowsPass.cpp
+++ b/Source/Engine/Renderer/ShadowsPass.cpp
@@ -22,7 +22,7 @@
 #define SHADOWS_POSITION_ERROR METERS_TO_UNITS(0.1f)
 #define SHADOWS_ROTATION_ERROR 0.9999f
 #define SHADOWS_MAX_TILES 6
-#define SHADOWS_MIN_RESOLUTION 16
+#define SHADOWS_MIN_RESOLUTION 32
 #define SHADOWS_MAX_STATIC_ATLAS_CAPACITY_TO_DEFRAG 0.7f
 #define SHADOWS_BASE_LIGHT_RESOLUTION(atlasResolution) atlasResolution / MAX_CSM_CASCADES // Allow to store 4 CSM cascades in a single row in all cases
 #define NormalOffsetScaleTweak METERS_TO_UNITS(1)
@@ -55,11 +55,11 @@ struct ShadowsAtlasRectTile : RectPackNode<uint16>
 uint16 QuantizeResolution(float input)
 {
     uint16 output = Math::FloorToInt(input);
-    uint16 alignment = 16;
+    uint16 alignment = 32;
     if (output >= 512)
-        alignment = 64;
+        alignment = 128;
     else if (output >= 256)
-        alignment = 32;
+        alignment = 64;
     output = Math::AlignDown<uint16>(output, alignment);
     return output;
 }