I found a old MRI scan of my brain and converted it to STL. A tiny bit of the top of my brain is cut off, maybe the doc didn't like me and canceled the scan before it finished :D but it gives a flat surface and doesn't really stand out if the model isn't too big. Have fun with my brain... I just printed it via SLA and resin at a 30% scale, comes out pretty cool. Don't know about FDM yet.