WebGLState: SubtrctiveBlending does not affect alpha anymore.

Author: Mugen87

examples/webgl_materials_blending.html

@@ -88,8 +88,6 @@
 						material.transparent = true;
 						material.blending = blending.constant;
 
-						if ( material.blending === THREE.SubtractiveBlending ) material.opacity = 0;
-
 						const x = ( i - blendings.length / 2 ) * 110;
 						const z = 0;
 

src/renderers/webgl/WebGLState.js

@@ -667,7 +667,7 @@ function WebGLState( gl, extensions, capabilities ) {
 							break;
 
 						case SubtractiveBlending:
-							gl.blendFunc( gl.ZERO, gl.ONE_MINUS_SRC_COLOR );
+							gl.blendFuncSeparate( gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE );
 							break;
 
 						case MultiplyBlending: