diff --git a/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.mtl b/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.mtl
new file mode 100644
index 0000000..d81606d
--- /dev/null
+++ b/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.mtl
@@ -0,0 +1,13 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Material
+Ns 96.078431
+Ka 0.100000 0.000000 0.000000
+Kd 0.640000 0.640000 0.640000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.100000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Kd cesium.png
diff --git a/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.obj b/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.obj
new file mode 100644
index 0000000..2762b61
--- /dev/null
+++ b/specs/data/box-mixed-attributes-2/box-mixed-attributes-2.obj
@@ -0,0 +1,67 @@
+# Blender v2.78 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib box-mixed-attributes-2.mtl
+o Cube
+v -1.000000 -1.000000 1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 -1.000000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 0.0000
+vt 0.0000 1.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 -1.0000 0.0000
+vn 0.0000 1.0000 0.0000
+# Using default material
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9 8/10 6/11 5/12
+f 5/13 6/14 2/15 1/16
+f 3//5 7//5 5//5 1//5
+f 8//6 4//6 2//6 6//6
+usemtl Material
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9 8/10 6/11 5/12
+f 5/13 6/14 2/15 1/16
+f 3//5 7//5 5//5 1//5
+f 8//6 4//6 2//6 6//6
+usemtl Missing
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9 8/10 6/11 5/12
+f 5/13 6/14 2/15 1/16
+f 3//5 7//5 5//5 1//5
+f 8//6 4//6 2//6 6//6
+o CubeCopy
+usemtl Material
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/5/2 4/6/2 8/7/2 7/8/2
+f 7/9 8/10 6/11 5/12
+f 5/13 6/14 2/15 1/16
+f 3//5 7//5 5//5 1//5
+f 8//6 4//6 2//6 6//6
diff --git a/specs/data/box-mixed-attributes-2/cesium.png b/specs/data/box-mixed-attributes-2/cesium.png
new file mode 100644
index 0000000..3b8baee
Binary files /dev/null and b/specs/data/box-mixed-attributes-2/cesium.png differ
diff --git a/specs/lib/createGltfSpec.js b/specs/lib/createGltfSpec.js
index 1c4818a..26f6929 100644
--- a/specs/lib/createGltfSpec.js
+++ b/specs/lib/createGltfSpec.js
@@ -4,14 +4,17 @@ var Promise = require('bluebird');
 var obj2gltf = require('../../lib/obj2gltf');
 var createGltf = require('../../lib/createGltf');
 var loadObj = require('../../lib/loadObj');
+var getDefaultMaterial = require('../../lib/loadMtl').getDefaultMaterial;
 
 var clone = Cesium.clone;
+var defined = Cesium.defined;
 var WebGLConstants = Cesium.WebGLConstants;
 
 var boxObjPath = 'specs/data/box/box.obj';
 var groupObjPath = 'specs/data/box-objects-groups-materials/box-objects-groups-materials.obj';
 var complexObjPath = 'specs/data/box-complex-material/box-complex-material.obj';
 var noMaterialsObjPath = 'specs/data/box-no-materials/box-no-materials.obj';
+var mixedAttributesObjPath = 'specs/data/box-mixed-attributes-2/box-mixed-attributes-2.obj';
 
 var options;
 
@@ -20,6 +23,7 @@ describe('createGltf', function() {
     var groupObjData;
     var complexObjData;
     var noMaterialsObjData;
+    var mixedAttributesObjData;
 
     beforeEach(function(done) {
         options = clone(obj2gltf.defaults);
@@ -42,6 +46,10 @@ describe('createGltf', function() {
             loadObj(noMaterialsObjPath, options)
                 .then(function(data) {
                     noMaterialsObjData = data;
+                }),
+            loadObj(mixedAttributesObjPath, options)
+                .then(function(data) {
+                    mixedAttributesObjData = data;
                 })
         ]).then(done);
     });
@@ -163,6 +171,74 @@ describe('createGltf', function() {
         expect(attributes.TEXCOORD_0).toBeUndefined();
     });
 
+    it('splits incompatible materials', function() {
+        var gltf = createGltf(mixedAttributesObjData, options);
+        var materials = gltf.materials;
+        var meshes = gltf.meshes;
+        var i;
+        var material;
+
+        var referenceMaterial = mixedAttributesObjData.materials[0];
+        delete referenceMaterial.name;
+        referenceMaterial.pbrMetallicRoughness.baseColorTexture = {
+            index : 0
+        };
+
+        var referenceMaterialNoTextures = clone(referenceMaterial, true);
+        referenceMaterialNoTextures.pbrMetallicRoughness.baseColorTexture = undefined;
+
+        var defaultMaterial = getDefaultMaterial(options);
+        delete defaultMaterial.name;
+
+        var materialNames = materials.map(function(material) {
+            var name = material.name;
+            delete material.name;
+            return name;
+        });
+
+        // Expect three copies of each material for
+        // * positions/normals/uvs
+        // * positions/normals
+        // * positions/uvs
+        expect(materialNames).toEqual([
+            'default',
+            'default-2',
+            'default-3',
+            'Material',
+            'Material-2',
+            'Material-3',
+            'Missing',
+            'Missing-2',
+            'Missing-3'
+        ]);
+
+        expect(materials.length).toBe(9);
+        expect(materials[0]).toEqual(defaultMaterial);
+        expect(materials[1]).toEqual(defaultMaterial);
+        expect(materials[2]).toEqual(defaultMaterial);
+        expect(materials[3]).toEqual(referenceMaterial);
+        expect(materials[4]).toEqual(referenceMaterial);
+        expect(materials[5]).toEqual(referenceMaterialNoTextures);
+        expect(materials[6]).toEqual(defaultMaterial);
+        expect(materials[7]).toEqual(defaultMaterial);
+        expect(materials[8]).toEqual(defaultMaterial);
+
+        // Test that primitives without uvs reference materials without textures
+        var meshesLength = meshes.length;
+        for (i = 0; i < meshesLength; ++i) {
+            var mesh = meshes[i];
+            var primitives = mesh.primitives;
+            var primitivesLength = primitives.length;
+            for (var j = 0; j < primitivesLength; ++j) {
+                var primitive = primitives[j];
+                material = materials[primitive.material];
+                if (!defined(primitive.attributes.TEXCOORD_0)) {
+                    expect(material.pbrMetallicRoughness.baseColorTexture).toBeUndefined();
+                }
+            }
+        }
+    });
+
     function expandObjData(objData, duplicatesLength) {
         var primitive = objData.nodes[0].meshes[0].primitives[0];
         var indices = primitive.indices;