make fast sampling a serialized setting

Editor/LTCGI_Controller.cs

@@ -36,6 +36,13 @@ public partial class LTCGI_Controller : MonoBehaviour
         [Tooltip("Renderers that may change material during runtime. Otherwise only 'sharedMaterial's are updated for performance reasons.")]
         public Renderer[] DynamicRenderers;
 
+#if UNITY_STANDALONE
+        [Tooltip("When enabled, LTCGI will not use a blur chain but rather just the input texture's mip maps. This is faster and saves samplers, but will not look as good.")]
+        public bool FastSampling = false;
+#else
+        public bool FastSampling => true; // force-enable on Quest, but allow use of toggle in C# code below on Standalone too (to avoid unnecessarily uploading LOD CRT references)
+#endif
+
         [Header("Expert Settings")]
         [Tooltip("Do not automatically set up the blur chain. Use this if you use AVPro to set _MainTex on the LOD1 material for example.")]
         public bool CustomBlurChain = false;
@@ -544,27 +551,33 @@ public void UpdateMaterials(bool fast, LTCGI_Screen screen = null)
                 adapter._Screens = screens.Select(x => x != null ? x.gameObject : null).ToArray();
                 adapter._LTCGI_LODs = new Texture[4];
                 adapter._LTCGI_LODs[0] = VideoTexture;
-                #if UNITY_STANDALONE
+                if (!FastSampling)
+                {
                     adapter._LTCGI_LODs[1] = LOD1;
                     adapter._LTCGI_LODs[2] = LOD2;
                     adapter._LTCGI_LODs[3] = LOD3;
-                #else
+                }
+                else
+                {
                     adapter._LTCGI_LODs[1] = null;
                     adapter._LTCGI_LODs[2] = null;
                     adapter._LTCGI_LODs[3] = null;
-                #endif
+                }
                 if (_LTCGI_LOD_arrays != null)
                 {
                     adapter._LTCGI_Static_LODs_0 = _LTCGI_LOD_arrays[0];
-                    #if UNITY_STANDALONE
+                    if (!FastSampling)
+                    {
                         adapter._LTCGI_Static_LODs_1 = _LTCGI_LOD_arrays[1];
                         adapter._LTCGI_Static_LODs_2 = _LTCGI_LOD_arrays[2];
                         adapter._LTCGI_Static_LODs_3 = _LTCGI_LOD_arrays[3];
-                    #else
+                    }
+                    else
+                    {
                         adapter._LTCGI_Static_LODs_1 = null;
                         adapter._LTCGI_Static_LODs_2 = null;
                         adapter._LTCGI_Static_LODs_3 = null;
-                    #endif
+                    }
                 }
                 else
                 {
@@ -590,11 +603,10 @@ public void UpdateMaterials(bool fast, LTCGI_Screen screen = null)
                         Math.Max(adapter._LTCGI_ScreenCountDynamic,
                             Array.FindLastIndex(mask, m => m == 0.0f) + 1)).ToArray();
                 adapter._LTCGI_ScreenCountMaskedAvatars = Array.FindLastIndex(screens, x => x.AffectAvatars) + 1;
-                #if UNITY_STANDALONE
-                    adapter.BlurCRTInput = LOD1s;
-                #else
+                if (FastSampling)
                     adapter.BlurCRTInput = null;
-                #endif
+                else
+                    adapter.BlurCRTInput = LOD1s;
 
                 #pragma warning disable 618
                 adapter.ApplyProxyModifications();

Editor/LTCGI_ControllerExternal.cs

@@ -22,6 +22,7 @@ public class LTCGI_ControllerEditor : Editor
         private static readonly string[] CONFIGURATION_PROPS = new[] {
             #if UNITY_STANDALONE
             "StaticTextures",
+            "FastSampling",
             #endif
             "DynamicRenderers",
             "CustomBlurChain",
@@ -258,12 +259,12 @@ public override void OnInspectorGUI()
                     bool? forceSet = null;
 
                     #if !UNITY_STANDALONE
-                        if (name == "LTCGI_FAST_SAMPLING")
-                            forceSet = true;
                         if (name == "LTCGI_STATIC_TEXTURES")
                             forceSet = false;
                         if (name == "LTCGI_DISABLE_LUT2")
                             forceSet = true;
+                        if (name == "LTCGI_BLENDED_DIFFUSE_SAMPLING")
+                            forceSet = false;
                     #endif
 
                     if (type == ConfigType.Boolean)
@@ -444,6 +445,17 @@ public static void RecalculateAutoConfig(LTCGI_Controller controller)
                         }
                     }
 
+                    if (line.EndsWith("#define LTCGI_FAST_SAMPLING"))
+                    {
+                        var enabledInConfig = !line.StartsWith("//");
+                        var available = controller.FastSampling;
+                        if (enabledInConfig != available)
+                        {
+                            config[i] = (available ? "" : "//") + "#define LTCGI_FAST_SAMPLING";
+                            changed = true;
+                        }
+                    }
+
                     if (line.EndsWith("#define LTCGI_CYLINDER"))
                     {
                         var enabledInConfig = !line.StartsWith("//");

Shaders/LTCGI_config.cginc

@@ -20,10 +20,6 @@
 /// a bit more with global screen color data. Slight performance cost.
 //#define LTCGI_BLENDED_DIFFUSE_SAMPLING
 
-/// Slightly simplified and thus faster sampling for reflections at the cost of quality.
-/// Consider using this if your scene looks about the same with this enabled.
-//#define LTCGI_FAST_SAMPLING
-
 /// Disable extra specular detail LUT, saves a sampler.
 //#define LTCGI_DISABLE_LUT2
 
@@ -85,4 +81,7 @@ const float LUT_BIAS = 0.5/LUT_SIZE;
 // Activate avatar mode, which overrides certain configs from above.
 //#define LTCGI_AVATAR_MODE
 
+// Slightly simplified and thus faster sampling for reflections at the cost of quality.
+//#define LTCGI_FAST_SAMPLING
+
 #endif

Shaders/LTCGI_functions.cginc

@@ -232,6 +232,7 @@ void LTCGI_sample(float2 uv, uint lod, uint idx, float blend, out float3 result)
         return;
         #endif
     }
+    #ifdef LTCGI_STATIC_TEXTURES
     else
     {
         [forcecase]
@@ -263,6 +264,7 @@ void LTCGI_sample(float2 uv, uint lod, uint idx, float blend, out float3 result)
                 return;
         }
     }
+    #endif
 #endif
 }