Glass appear black on render

I did a little scene and there’s a glass on a table. But when I render it appear black. I have the same glass in an other scene and it’s okay. Can someone help me?



Here the glass look normal.


here its black

I hope someone know why. If you need more information I can give you them!
Here’s the blender file:
http://pasteall.org/blend/index.php?id=48237

You may just need to increase your bounces.

yes, bounces in render settings.

Most objects have unapplied scale. ctrl+A -> scale to apply.

You’re not using subdivision surfaces right. Way too high subdivisions because the editing cage is not modeled to support more reasonable subdivisions. Subdivision modifier visibility is set to be shown on the editing cage, hiding the actual vertex positions, which can result to messy geometry like with one of the table legs.