Ztree has asked me to release the new models of rocks he has made. They are released as modders resources.

You can find them here on Nexus
http://skyrim.nexusmods.com/mods/29490

There are 13 different models, all with working collision, and the rock models are whole and have texture all around, so they can be turned in any direction.
The textures used are from my http://skyrim.nexusmods.com/mods/19066, and each rock uses 13 different texture variants.

These models have been very useful for us and I hope they will be for your mods as well