I actually have a wonderful idea for you all on the utk.io team...
...could you create an option to add a shader when you make a texture pack. it doesn't have to be a complicated option that involves importing and editing, just an on off switch under the no lag mode switch so that other players especially younger ones can easily pop in a ready made shader that you have provided. I don't expect you to have this option ready for the next update seeing that its a very early build but I do hope this suggestion would be seen and put through consideration.
Can You Make It To Have A Custom Shade? (Maybe When You Check It There Will Be An Advanced Options?)
It won't really be that hard, just take a normal shader and plop it on top close to where the other blocks are placed