Here is another picture. This time i experimented with the absorption medium. I hope these little fellows look a bit like gummy bears.
It rendered 1:51h on a GTX 780. At 2015 samples PT I stopped and denoised it in Photoshop. I guess it would need about 2 renderhours more to get noisefree. Testrenderings without the any opacity were much faster. This one has 0,026 % opacity, i am sure that wasn´t worth it.
