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Hi, I'm new to Babylon.js and to this forum, so perhaps I am missing something obvious. The documentation on PBR http://doc.babylonjs.com/overviews/Physically_Based_Rendering has an image of beautiful materials with different glossiness and reflectivity values. But when I run the demo Playground Demo Scene - PBR Materials in my browser (Safari or Chrome, on a Macbook Pro), the materials look much less impressive. For low glossiness and reflectivity values, the spheres don't look "rough" with a lot of light scattering. Instead I can clearly see the edges of the skybox. See attached screenshot, the spheres in the top right corner. Why is this happening? Is it my hardware? Did something change in the source code since the picture was taken? Thanks! [Edit] complete specs: Chrome Version 48.0.2564.116 (64-bit) and 49.0.2623.87 (64-bit) Safari Version 9.0.3 (10601.4.4) MacBook Pro (Retina, 13-inch, Early 2015) Intel Iris Graphics 6100 1536 MB 2,7 GHz Intel Core i5 8 GB 1867 MHz DDR3