Merged in SL-14113 (pull request #526)

SL-14113

Approved-by: Euclid Linden

3 files changed, 14 insertions, 3 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
index ae1ac5de7f..f1187fef9a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
@@ -126,6 +126,6 @@ void main()
     frag_data[1] = vec4(0.0,0.0,0.0,0.0);
     frag_data[2] = vec4(0,0,0,1);
 
-    gl_FragDepth = 0.99995f;
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113 Stars and Clouds need same depth
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
index 35068899ee..e709d73bfa 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
@@ -55,6 +55,12 @@ void main()
         fade = clamp( moon_dir.z*moon_dir.z*4.0, 0.0, 1.0 );
 
     vec4 c      = texture2D(diffuseMap, vary_texcoord0.xy);
+
+    // SL-14113 Don't write to depth; prevent moon's quad from hiding stars which should be visible
+    // Moon texture has transparent pixels <0x55,0x55,0x55,0x00>
+    if (c.a <= 2./255.) // 0.00784
+        discard;
+
 //       c.rgb  = srgb_to_linear(c.rgb);
          c.rgb *= moonlight_color.rgb;
          c.rgb *= moon_brightness;
@@ -68,6 +74,6 @@ void main()
     frag_data[1] = vec4(0.0);
     frag_data[2] = vec4(0.0f);
 
-    gl_FragDepth = 0.999985f;
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
index bac79a9fdc..8d9c7e3507 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
@@ -46,8 +46,13 @@ float twinkle(){
     return abs(d);
 }
 
+// See:
+// ALM off: class1/environment/starsF.glsl
+// ALM on : class1/deferred/starsF.glsl
 void main() 
 {
+	// camera above water: class1\deferred\starsF.glsl
+	// camera below water: class1\environment\starsF.glsl
     vec4 col_a = texture2D(diffuseMap, vary_texcoord0.xy);
     vec4 col_b = texture2D(diffuseMap, vary_texcoord0.xy);
     vec4 col = mix(col_b, col_a, blend_factor);
@@ -62,6 +67,6 @@ void main()
     frag_data[1] = vec4(0.0f);
     frag_data[2] = vec4(0.0, 1.0, 0.0, 1.0);
 
-    gl_FragDepth = 0.99995f;
+    gl_FragDepth = LL_SHADER_CONST_STAR_DEPTH; // SL-14113 Moon Haze -- Stars need to depth test behind the moon
 }