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This guy was modeled in Ray Dream Studio, and rendered using a Thinkfish rendering module for the pen-and-ink effect.
This piece was drawn by hand, using a Wacom pressure-sensitive tablet and Painter software, which simulates natural media like paper, pencils, pen, and ink on the computer.
The whale was modeled and animated in Ray Dream Studio. I used a wave deformer on the model to get the basic swimming motion.