From my understanding I put U1 V1 from text coord, add U0.2 U2 constant to it and the add should send U1.2 and V3 to the UV of the texture sample. It doesnt, so i’m wondering what I misunderstood!
If you want to change the tiling, you need to multiply/divide the UV. By adding you’re just shifting everything (and shifting by whole numbers means you won’t even see a difference on a square that is exactly covered by the UV).