Making a good sig

[Sabre120]

Good evening guys and girls (Or afternoon, or morning wherever you are). Now I came to present a query. As I ponder over the numerous threads on this site I can't help but notice the brilliant threads that are around, and I am incredibly jealous at some of your artistic talent :laugh:. Anyway what I wanted to know is, how can I make a sig to that degree of detail. I know how to fluently use photoshop, but what other things should I take into account? For instance where could I get a sci-fi type picture for a background, and so on so forth, any advice and help would be hugely appreciated thanks guys! ;)

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Dream Theater - "Sabre120 and Jongleur officially win. That is all."