diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index 95940dcd88101cebf28352b0883edc38e19f171a..1ef410557ddd7f82ca22154247509ec92d7243e5 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -825,14 +825,14 @@ function WebGLRenderer( parameters ) {
 
 		}
 
-		var rangeStart = geometry.drawRange.start;
-		var rangeCount = geometry.drawRange.count;
+		var rangeStart = geometry.drawRange.start * rangeFactor;
+		var rangeCount = geometry.drawRange.count * rangeFactor;
 
-		var groupStart = group !== null ? group.start : 0;
-		var groupCount = group !== null ? group.count : Infinity;
+		var groupStart = group !== null ? group.start * rangeFactor : 0;
+		var groupCount = group !== null ? group.count * rangeFactor : Infinity;
 
-		var drawStart = Math.max( rangeStart, groupStart ) * rangeFactor;
-		var drawEnd = ( Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1 ) * rangeFactor;
+		var drawStart = Math.max( rangeStart, groupStart );
+		var drawEnd = Math.min( dataCount, rangeStart + rangeCount, groupStart + groupCount ) - 1;
 
 		var drawCount = Math.max( 0, drawEnd - drawStart + 1 );