Material/texture help needed

Started a small project at the beginning of this week but been having problems with materials and textures. I have overcome most but I am still having a problem with the liquid. As you can see from the image below my lemons/lime and ice cubes look as if theyre black. Im guessing it is light distortion, but how to do get round it.


Any help would be helpful.

Ive tried changing ior values and overlapping like he said, still no luck. Im stuck.

For anything more specific than that link, we would need to know at least something about your scene, meshes, and materials.

In the performance settings, I just changed a setting from dynamic bvh to static bvh. That made a difference, what is it and is it just for my viewport.

Blend file here if anyone interested http://www.pasteall.org/blend/26330

Try increase the Bounce number (Light paths).

Changed the min Bounce number, and it works. Thanks very much Sielan. Also thank you to JA12 and K Horseman for your time.