Import the STL file into the print software and print the sculpture. There are a wide variety of software packages that can achieve the same results, ...
This Instructable will show how to take a sculpture from Zbrush and prepare the file for 3D printing. The process utilizes Zbrush 3.1 and Rhino 3D, but most other 3D modeling programs will work fine. The final print was sent to a Dimension ABS printer and took about 8 hours to print. This process runs conjunction with another Instrucable that I recently wrote that could be found at: http://www.instructables.com/id/Digital_Sculpting_3D_Printing_and_Animatronics/
Step 1: Sculpture
The first step requires one to create a sculpture in Zbrush. Sculpt whatever you like. What is important is that you keep the resolution of the model to the proper subdivision level. This model was subdivided 3 times to insure the best print resolution, without creating too large of a file. After the sculpture is finished, export the tool as an OBJ file.