[DeadlyAppearance]

The shadow and caustics aren`t nice but i like the glas shader.
I have no idear what`s wrong with the shadow etc.

[Hervé]

cool this is a real "prosit" glass....

[Aldaryn]

Nice render!

If you want more visible, more pronounced caustics, use a spotlight along with the fill planes.
More contrast would help too.

[DeadlyAppearance]

Aldaryn, can you explain me what you mean. How i make a spotlight along the fill planes? I don`t understand you .

Here is a quick MXI test. But i have the problem that if i press render the most time the result is different ^^. I have more then 5 different render results. And i only click render...
But this was the best and i think the correct result.