Project One -- for the third week of class -- involved sculpting a rock using a reference photo. The rock could be a mineral, fossil, or other formation. We would then paint the object within zBrush and render it out for two screenshots.
For my project, I chose to model a block of fluorite covered with white calcite crystals. The biggest hurdle I faced was with the modeling and figuring out some more advanced zBrush tools. After a lot of trial and error, I made a brush for the individual crystals and painted them onto the larger fluorite cube. This made it possible to build the piece and edit the tool without an issue. After all that, I messed around with BPR transparency, created a plane subtool for the backdrop, and rendered it out for submission.