5-6_lovely_lake.blend (1.3 MB)
Lake Baikal is the largest lake by volume in the world. It’s also one of the clearest. Methane is released by decaying plant matter, and the bubbles get trapped under ice, eventually building up layers and layers of frozen bubbles, seemingly suspended in the crystal clear ice.
Reference photo:
I love your image, great blender-work!
Thank you for sharing the reference-photo. I have seen lakes with methane ice-bubbles before, but I was not aware that Baikal did this too. Extra points for teaching me something! 
I featured you on BlenderNation, have a great weekend!
Amazing! Great eye for detail.
When a render looks enough like a photo to make the rest of us check. Nice work.
