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-rw-r--r--progs/glsl/reflect.vert1
1 files changed, 1 insertions, 0 deletions
diff --git a/progs/glsl/reflect.vert b/progs/glsl/reflect.vert
index 402be38bf7..e1f22def33 100644
--- a/progs/glsl/reflect.vert
+++ b/progs/glsl/reflect.vert
@@ -11,6 +11,7 @@ void main()
float two_n_dot_u = 2.0 * dot(n, u);
vec4 f;
f.xyz = u - n * two_n_dot_u;
+ f.w = 1.0;
// outputs
normal = n;