ShaderLib: Fixed dashed. See #5805.

src/renderers/shaders/ShaderLib.js

@@ -292,7 +292,7 @@ THREE.ShaderLib = {
 				THREE.ShaderChunk[ "skinnormal_vertex" ],
 				THREE.ShaderChunk[ "defaultnormal_vertex" ],
 
-			"#ifndef FLAT_SHADED",
+			"#ifndef FLAT_SHADED", // Normal computed with derivatives when FLAT_SHADED
 
 			"	vNormal = normalize( transformedNormal );",
 
@@ -513,6 +513,9 @@ THREE.ShaderLib = {
 
 				THREE.ShaderChunk[ "logdepthbuf_fragment" ],
 				THREE.ShaderChunk[ "color_fragment" ],
+
+			"	outgoingLight = diffuseColor.rgb;", // simple shader
+
 				THREE.ShaderChunk[ "fog_fragment" ],
 
 			"	gl_FragColor = vec4( outgoingLight, diffuseColor.a );",	// TODO, this should be pre-multiplied to allow for bright highlights on very transparent objects