# Metalness and Roughness maps example in Chapter 11

**URL:** <https://forums.kodeco.com/t/metalness-and-roughness-maps-example-in-chapter-11/25292>\
**Category:** 3D iOS Games by Tutorials\
**Created:** [January 17, 2017, 5:27pm UTC](https://forums.kodeco.com/t/metalness-and-roughness-maps-example-in-chapter-11/25292 "2017-01-17T17:27:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![pcbeard](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/pcbeard/32/70079_2.png) [@pcbeard](https://forums.kodeco.com/u/pcbeard)\
**Post date:** [January 17, 2017, 5:27pm UTC](https://forums.kodeco.com/t/metalness-and-roughness-maps-example-in-chapter-11/25292/1 "2017-01-17T17:27:10Z")

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When I open the example “13\_MetalnessVSRoughness.scn” in Xcode, I’m not seeing anything but dark gray spheres:

 ![](https://raywenderlich-com-v3-forums.s3.amazonaws.com/original/3X/f/0/f03530c8271c0e655672710239eb3352e54f89ca.png)

I’m using Xcode 8.2.1. Is this expected?