Tiling gui textures possible?

Ok, so making a tiling texture sampler in my material worked perfectly, but now I need to tell the shader how much to scale the uv’s, since the uv scale is dependent on how large my gui-box-node is during the current frame. There doesn’t seem to be any gui.set_constant, so I’m wondering if you guys have any ideas on how to make this happen.

What I am trying to do is a beam that grows out from the avatar, and I want the texture to be the same “resolution” from start to finish.