SL-1491

Nerf backfacing additive in ALM to prevent lens flares when facing away from sun.

Use hack in spec gbuffer alpha to nerf additive only on terrain (leaves additive glare for sunsets on water).

1 files changed, 3 insertions, 1 deletions

diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index 23ed3fb3d9..ee39fa81f5 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -184,7 +184,9 @@ vec3 post_env = color.rgb;
         if (norm.w < 1)
         {
 #if !defined(SUNLIGHT_KILL)
-            color = atmosFragLighting(color, additive, atten);
+            vec3 p = normalize(pos.xyz);
+            float additive_angular_atten = max(0.0, dot(light_dir.xyz, p.xyz));
+            color = atmosFragLighting(color, additive * additive_angular_atten * (1.0 - spec.a), atten);
             color = scaleSoftClipFrag(color);
 #endif
         }