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, 2 insertions, 1 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 0d180e5798..fd1191547b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -176,7 +176,8 @@ vec3 post_env = color.rgb;
         if (norm.w < 1)
         {
 #if !defined(SUNLIGHT_KILL)
-            color = atmosFragLighting(color, additive, atten);
+            float additive_angular_atten = max(0.0, dot(light_dir, normalize(pos.xyz)));
+            color = atmosFragLighting(color, additive * additive_angular_atten * (1.0 - spec.a), atten);
             color = scaleSoftClipFrag(color);
 #endif
         }