How were the blue stripes created in the image below? Was this a photoshop-like texture?
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There are so many ways this could be done that it is hard to say.
One way would be to have an image that has the blue circle thing with the stripes on it, and just display part of the image (with masking or something similar).
Another method would be to overlay a texture with only the lines (and a proper alpha (transparency)) component, on top of a blue background.
You could also draw individual lines on top of a blue background.