Merge pull request #13128 from Mugen87/dev4

WebGLRenderer: Enable rendering without index and position attribute

src/renderers/WebGLRenderer.js

@@ -760,7 +760,7 @@ function WebGLRenderer( parameters ) {
 
 		//
 
-		var dataCount = 0;
+		var dataCount = Infinity;
 
 		if ( index !== null ) {