Can I kiss you? This actually helped me a TON with getting the material moving, thank you <3
For anyone having the same problem, the picture to my answer is way at the bottom, where he plugs in “Create Dynamic Material Instance” into Event Construct, and promotes it. At “Set Scalar Parameter Value”, you’re supposed to put the exact name of the parameter in your material that you want to change (in my case, the fill was called “percentage”, so I put that in “parameter name”).