From 8173f43770e9d83e67cd3488d506c85330a95c2d Mon Sep 17 00:00:00 2001
From: Kaleb Reid <78945904+Kaleb-Reid@users.noreply.github.com>
Date: Sun, 12 Oct 2025 23:21:21 -0700
Subject: [PATCH] Apply luminance multiplier in copy_cubemap_to_panorama

---
 servers/rendering/renderer_rd/effects/copy_effects.cpp  | 2 ++
 servers/rendering/renderer_rd/effects/copy_effects.h    | 2 +-
 servers/rendering/renderer_rd/shaders/effects/copy.glsl | 4 ++--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/servers/rendering/renderer_rd/effects/copy_effects.cpp b/servers/rendering/renderer_rd/effects/copy_effects.cpp
index 69ccb24ecfa..693bba0e03a 100644
--- a/servers/rendering/renderer_rd/effects/copy_effects.cpp
+++ b/servers/rendering/renderer_rd/effects/copy_effects.cpp
@@ -401,6 +401,8 @@ void CopyEffects::copy_cubemap_to_panorama(RID p_source_cube, RID p_dest_panoram
 	copy.push_constant.target[1] = 0;
 	copy.push_constant.camera_z_far = p_lod;
 
+	copy.push_constant.luminance_multiplier = prefer_raster_effects ? 2.0 : 1.0;
+
 	// setup our uniforms
 	RID default_sampler = material_storage->sampler_rd_get_default(RS::CANVAS_ITEM_TEXTURE_FILTER_LINEAR, RS::CANVAS_ITEM_TEXTURE_REPEAT_DISABLED);
 
diff --git a/servers/rendering/renderer_rd/effects/copy_effects.h b/servers/rendering/renderer_rd/effects/copy_effects.h
index 0f220b28936..c753ff4a0ae 100644
--- a/servers/rendering/renderer_rd/effects/copy_effects.h
+++ b/servers/rendering/renderer_rd/effects/copy_effects.h
@@ -138,7 +138,7 @@ private:
 		int32_t section[4];
 		int32_t target[2];
 		uint32_t flags;
-		uint32_t pad;
+		float luminance_multiplier;
 		// Glow.
 		float glow_strength;
 		float glow_bloom;
diff --git a/servers/rendering/renderer_rd/shaders/effects/copy.glsl b/servers/rendering/renderer_rd/shaders/effects/copy.glsl
index debf6b73673..fa8e0590fc9 100644
--- a/servers/rendering/renderer_rd/shaders/effects/copy.glsl
+++ b/servers/rendering/renderer_rd/shaders/effects/copy.glsl
@@ -20,7 +20,7 @@ layout(push_constant, std430) uniform Params {
 	ivec4 section;
 	ivec2 target;
 	uint flags;
-	uint pad;
+	float luminance_multiplier;
 	// Glow.
 	float glow_strength;
 	float glow_bloom;
@@ -276,7 +276,7 @@ void main() {
 #else
 	vec4 color = textureLod(source_color, vec4(normal, params.camera_z_far), 0.0); //the biggest the lod the least the acne
 #endif
-	imageStore(dest_buffer, pos + params.target, color);
+	imageStore(dest_buffer, pos + params.target, color * params.luminance_multiplier);
 #endif // defined(MODE_CUBEMAP_TO_PANORAMA) || defined(MODE_CUBEMAP_ARRAY_TO_PANORAMA)
 
 #ifdef MODE_SET_COLOR