SL-1491 take two: fix non-ALM/class2 atmospherics additive artifacts

Modulate class1 softenLight atmospheric additive by specular.a (same fix as for class2).

Clamp additive color to <= vec3(0.2) to avoid similar artifacts in non-deferred render path.

1 files changed, 3 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsVarsV.glsl b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsVarsV.glsl
index 99dbee15ee..3b87c70932 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsVarsV.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsVarsV.glsl
@@ -73,6 +73,9 @@ void setAmblitColor(vec3 v)
 
 void setAdditiveColor(vec3 v)
 {
+    // SL-1491 clamp additive term to something reasonable to prevent
+    // lens flares over non-reflective surfaces
+    v = clamp(v, vec3(0), vec3(0.2));
 	additive_color = v;
 	vary_AdditiveColor = v;
 }