lsudny (often called suds by his friends, and glass_arm on IRC) is a Polish mapper who joined in early '10. Having many friends on NUMA, he has earned a spot as a recognized mapper. He holds four featured maps. Some people misspell his name, writing a big "i" instead of a small "L". He also points that his nick should be spelled all lowercase.
lsudny also makes music as Blue Void. His music is oscillating between downtempo, ambient and psytrance. you should check it out.