User blog comment:Willbachbakal/Singleplayer Plasmids/@comment-1330314-20100819215300

Depends on the upgrade path. So if you choose the Icicle Assault upgrade, then you entire arm will turn to pure ice, and you'll be able to see through it. If you were to choose another upgrade, the cosmetic and sound effect would be different. I suppose you'd have to take the Corpse Hive upgrade to develop an entire hive on your forearm (your entire arm would essenatially look like one giant honeycomb, with dome-shaped growths in certain places the size of baseballs).