diff --git a/lib/createGltf.js b/lib/createGltf.js
index 01c6093..0bb96a4 100644
--- a/lib/createGltf.js
+++ b/lib/createGltf.js
@@ -427,10 +427,10 @@ function createSpecularGlossinessTexture(gltf, specularImage, glossinessImage, o
     if (packSpecular) {
         // Write into the R, G, B channels
         var redChannel = getImageChannel(specularImage, 0, width, height, scratchChannel);
-        var greenChannel = getImageChannel(specularImage, 1, width, height, scratchChannel);
-        var blueChannel = getImageChannel(specularImage, 2, width, height, scratchChannel);
         writeChannel(pixels, redChannel, 0);
+        var greenChannel = getImageChannel(specularImage, 1, width, height, scratchChannel);
         writeChannel(pixels, greenChannel, 1);
+        var blueChannel = getImageChannel(specularImage, 2, width, height, scratchChannel);
         writeChannel(pixels, blueChannel, 2);
     }
 
@@ -824,6 +824,7 @@ function addMesh(gltf, materials, images, bufferState, uint32Indices, mesh, opti
     var hasNormals = mesh.normals.length > 0;
     var hasUVs = mesh.uvs.length > 0;
 
+    // Attributes are shared by all primitives in the mesh
     var accessorIndex;
     var attributes = {};
     if (hasPositions) {