diff --git a/bin/obj2gltf.js b/bin/obj2gltf.js
index e405daa..34ae5b4 100644
--- a/bin/obj2gltf.js
+++ b/bin/obj2gltf.js
@@ -9,8 +9,6 @@ var util = require('../lib/util');
 var defined = util.defined;
 var defaultValue = util.defaultValue;
 
-// TODO : assuming all paths in obj are relative, but should consider absolute paths
-// TODO : add command line flag for y-up to z-up
 // TODO : support zlib
 // TODO : support binary export
 if (process.argv.length < 3 || defined(argv.h) || defined(argv.help)) {
diff --git a/lib/gltf.js b/lib/gltf.js
index beace44..8254055 100644
--- a/lib/gltf.js
+++ b/lib/gltf.js
@@ -36,14 +36,18 @@ function getImages(inputPath, outputPath, combine, materials, done) {
 
     var imagesInfo = {};
     async.each(images, function (image, callback) {
-        var imagePath = path.join(inputPath, image);
-        var copyPath = path.join(outputPath, path.basename(image));
+        var imagePath = image;
+        if (!path.isAbsolute(imagePath)) {
+            imagePath = path.join(inputPath, image);
+        }
+        var baseName = path.basename(image);
+        var copyPath = path.join(outputPath, baseName);
         imageInfo(imagePath, function(info) {
             var uri;
             if (combine) {
                 uri = 'data:application/octet-stream;base64,' + info.data.toString('base64');
             } else {
-                uri = image;
+                uri = baseName;
             }
 
             imagesInfo[image] = {
@@ -54,7 +58,7 @@ function getImages(inputPath, outputPath, combine, materials, done) {
 
             if (combine) {
                 callback();
-            } else {
+            } else if (path.relative(imagePath, copyPath) !== '') {
                 fsExtra.copy(imagePath, copyPath, {clobber : true}, function (err) {
                     if (err) {
                         throw err;
@@ -177,11 +181,11 @@ function createGltf(data, modelName, inputPath, outputPath, binary, combine, tec
             if (!defined(image)) {
                 return undefined;
             }
-            return 'texture_' + image.substr(0, image.lastIndexOf('.'));
+            return 'texture_' + path.basename(image).substr(0, image.lastIndexOf('.'));
         }
 
         function getImageId(image) {
-            return 'image_' + image.substr(0, image.lastIndexOf('.'));
+            return 'image_' + path.basename(image).substr(0, image.lastIndexOf('.'));
         }
 
         var gltf = {
diff --git a/lib/obj.js b/lib/obj.js
index 591143e..e1dcf71 100644
--- a/lib/obj.js
+++ b/lib/obj.js
@@ -23,7 +23,11 @@ function getMaterials(contents, inputPath, done) {
         done({});
     } else {
         var mtlFile = mtllibMatches[0].substring(7).trim();
-        var mtlPath = path.join(inputPath, mtlFile);
+        var mtlPath = mtlFile;
+        if (!path.isAbsolute(mtlPath)) {
+            mtlPath = path.join(inputPath, mtlFile);
+        }
+
         Material.parse(mtlPath, function (materials) {
             done(materials);
         });