Hi,
I have serious problems with glass in two of my projects. It looks like in the picture I have attached to this mail.
How can I avoid this? I do not underdstand what´s going on there.
Best regards, Andreas
HI, i came to this problem. i have derived a solution to this.
there should be a refraction parameter in your material. Slide it towards a value of 1 and that should solve this problem.
the reason it is looking like this is because of the high refraction amount.
let me know if this fixes. i hope it will.
Thanks.
Thank you for your answer. After I changed the parameter to 1 everything is ok. But do I have still good reflections in my glass now? Unfortunately I cannot test it at the moment.
Best regards, Andreas
Make the glass material “2 sided” and you can adjust the refraction to every value you want. This do the trick. 
This is a good solution and helped me with the exact same problem.