paper lights

[faros-demo] / sdr / sky.f.glsl

diff --git a/sdr/sky.f.glsl b/sdr/sky.f.glsl
index 4b830fe..e1787ac 100644 (file)
--- a/sdr/sky.f.glsl
+++ b/sdr/sky.f.glsl
@@ -1,5 +1,7 @@
 varying vec3 local_pos;
 
+uniform float alpha;
+
 #define PI     3.141592653589793
 #define TWO_PI (2.0 * PI)
 
@@ -21,7 +23,7 @@ void main()
        vec3 skycol = mix(col_hor, col_zen, alt);
 
        gl_FragColor.rgb = mix(skycol, vec3(0.0, 0.0, 0.0), cval);
-       gl_FragColor.a = 1.0;
+       gl_FragColor.a = alpha;
 }
 
 const float cloud_dens = 0.25;