DRTVWR-4976 Misc shader cleanup.

Removed some potential div-by-0 NaNs and a mangled clamp.

2 files changed, 4 insertions, 4 deletions

diff --git a/indra/newview/app_settings/shaders/class2/windlight/cloudsV.glsl b/indra/newview/app_settings/shaders/class2/windlight/cloudsV.glsl
index 75e074cbf8..1f881eb44b 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/cloudsV.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/cloudsV.glsl
@@ -99,12 +99,12 @@ void main()
     // fade clouds beyond a certain point so the bottom of the sky dome doesn't look silly at high altitude
     altitude_blend_factor = clamp((rel_pos.y + 512.0) / max_y, 0.0, 1.0);
 
-    // Set altitude
+    // Adj position vector to clamp altitude
     if (rel_pos.y > 0.)
     {
         rel_pos *= (max_y / rel_pos.y);
     }
-    else
+    if (rel_pos.y < 0.)
     {
         rel_pos *= (-32000. / rel_pos.y);
     }
diff --git a/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl b/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
index 6528066a4e..a0a33b8642 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/skyV.glsl
@@ -67,12 +67,12 @@ void main()
     // Get relative position
     vec3 rel_pos = position.xyz - camPosLocal.xyz + vec3(0, 50, 0);
 
-    // Set altitude
+    // Adj position vector to clamp altitude
     if (rel_pos.y > 0.)
     {
         rel_pos *= (max_y / rel_pos.y);
     }
-    else
+    if (rel_pos.y < 0.)
     {
         rel_pos *= (-32000. / rel_pos.y);
     }