Fixed alpha on graphics shader

Author: bitnenfer

v3/src/renderer/webgl/shaders/UntexturedAndNormalizedTintedShader.js

@@ -22,7 +22,7 @@ module.exports = {
         'varying vec4 v_color;',
         'varying float v_alpha;',
         'void main() {',
-        '   gl_FragColor = vec4(v_color.bgr, v_alpha);',
+        '   gl_FragColor = vec4(v_color.bgr * v_alpha, v_alpha);',
         '}'
     ].join('\n')
 };