Eye Shaders Testing

last night, I tried to follow one of my "advance" tuts that i've ever had. I miss a lot of details and linking on the shaders, since i just skipped some of the earlier parts of the tutorials. it's a lil bit hard to understand if your foundations isn't strong enough. after struggle some time with it (and also reduces my sleep time, sadly), i managed to at least achieve 70% of what i wanted to achieve. However, i still need to watch and redo to remember and understand the basic of these things.