From bae0fc077b8bebfd159d8426223129581c9cf520 Mon Sep 17 00:00:00 2001
From: Ptolemy <ptolemy@lindenlab.com>
Date: Fri, 8 Jul 2022 07:52:19 -0700
Subject: SL-17703: PBR: Sun/Moon lighting is in sRGB

---
 .../newview/app_settings/shaders/class3/deferred/softenLightF.glsl  | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'indra/newview/app_settings/shaders/class3')

diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 822b3e473d..6c70781bee 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -339,10 +339,12 @@ void main()
 
         vec3 sun_contrib = min(da, scol) * sunlit;
 #if PBR_USE_ATMOS
-        color += sun_contrib;
+        color  = linear_to_srgb(color);
+        color += 2.0*sun_contrib;       // 2x = Undo legacy hack of calcAtmosphericVars() returning sunlight.rgb * 0.5;
         color *= atten.r;
-        color += 0.5*additive;
+        color += 2.0*additive;
         color  = scaleSoftClipFrag(color);
+        color  = srgb_to_linear(color);
 #endif // PBR_USE_ATMOS
 
     #if DEBUG_PBR_DIFFUSE
-- 
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