During a Cycles render an object behind glass looks striped Using Cycles I rendered a object inside a tube (it's glass material). The problem is the object edges are striped as shown here:



The same thing happened for another project too:

 

In the first render I tried different options but the issue is still there. Is there any way to fix this?
Make sure the object with the glass material has smooth shading.
You can change the shading of the object from the default flat shading by pressing  Space  and search for "Shade Smooth"