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. Currently, he holds six featured maps. lsudny has made lots of collabs (about 70); he is also the founder and active member of subdark collab group. His maps don't use innovative or original ideas, he rather focuses on pure fun.
He is a frequent user of IRC, usually being in #n, #n-mapping and several other channels. He has a cool bot shovelman who is capable of providing some fun sentences 24/7!
lsudny also makes music as Blue Void. His music is oscillating between downtempo, ambient and psytrance. you should check it out.