Texture Pack resolution slider doesnt work on realm.

Downloaded Actions & Stuff wanting to use it along side Chroma Hill texture pack, and while I can modify the textures in a basic world from 16x to 64x, you can't do the same in Realms for some reason. From what I understand, this has been an issue for years that hasn't been addressed. I would like to enjoy the game with all of the textures of Chroma Hills, along side the motion affect Actions & Stuff has to offer. Sense Realms are subscription based, I would figure this issue would be address so players like myself continue to pay and enjoy these skin pack they way they want to use. I wish my armor and other textures looked more like Chorma Hills, and not a blend of the two.