Started with a block out in Maya before bringing moving into ZBrush. After finishing the details I edited my blockout to create my low res version. Baked and textured with Substance Painter. Screenshots taken with Sketchfab. This was a very fun project to try and to get to know ZBrush a little better. Here is the source of the concept art: http://tackface.blogspot.com/2015/03/rift-porticulum-concepts.html
Siren's Gateway 3D