A scene created in blender, and rendered in cycles. I started this project to find a better way at creating extruded tubes with text. And thought that a neon sign was the best option.
I put it on blendswap: http://www.blendswap.com/blends/view/72675
I also created a tutorial for it:
Nice, a bit low on the samples perhaps. Try doubling them.
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Increased samples, made the DoF less noisy. Also increased the saturation, and changed the way and positioning of the camera.
