I've re-posted an old tutorial on how to create Dark Art. I figured some of you might find this helpful or useful. Anyhow, if you have any questions, leave a comment on the blog and I'll do my best to help you out! You can check the end result below, or jump straight to the tutorial.
If I remember correctly, I was using Photoshop CS when I wrote this. I'm not sure whether it can be directly ported over to Corel since I've never used it myself.