**System Information**
Operating system and graphics card
Win 7 64 bits, gforce 770
**Blender Version**
Broken: (example: 2.69.7 4b206af, see splash screen)
Worked: (optional)
official 2.70 and last nightly blender-2.70-b179647-win64
**Short description of error**
When I render glass with cycles, result seems wrong. Refraction seems to lack of detail, compared to Vray, Yafaray or even Blender internal... So I made a test file with a pure refraction shader and I can confirm this. As if refraction bounces was kind of limited (my test was in full illumination mode)
By the way, I've got another little issue with cycles with CPU in viewport. Some part of refractive objects are black, if you choose GPU, it's right, or if you laucn a real render, but CPU in viewport does strange things. Maybe this is correlated.
{F85018}
{F85019}
{F85020}
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps
hit render
{F85017}
{F85016}