Too big (in memory size) STL exports I recently exported one of the Dota 2 characters after applying all the displacement masks to give all the skin and scale textures to the character.
The whole character was divided into 6 parts and each part has to b subdivided and then the displacement has to b applied to give better effects.
I worked on Pudge and after all the tweaking the stl file exported was of 1.8GB,
yeah GB, 
What to do , none of the 3D printing services around me are able to open or print the file , it taking too ling to even open and in most cases the 3D printer software crashes.   

Even blender is not responding when importing the same stl file
I once had a complicated mesh that was too big for blender. I ended up using MeshLab to simplify the mesh. It might be worth taking a shot. Here is a tutorial on simplifying a mesh.