message: Shader cleanup
diff: @@ -6,17 +6,14 @@ varying float v_thickness;
  // Note: twice the one defined in the vertex shader
  const float feather = 1.0;
  +const vec4 color0 = vec4(0.0, 0.0, 0.0, 0.0);
  void main(void) {
  - vec4 color0 = vec4(0.0, 0.0, 0.0, 0.0);
  -
  - float radius = v_thickness;
  -
  - float dist = length(v_normal) * radius;
  + float dist = length(v_normal) * v_thickness;
  float t = smoothstep(
  - radius - feather,
  - radius,
  + v_thickness - feather,
  + v_thickness,
  dist
  );
  