The issue was the SphereMask hardness was too high (for in-game, not the material editor). Maybe I misunderstood but changing the sphere size did nothing. But fixing the hardness worked, so it’s all good.
You’re awesome man! Just one question regarding what you told me… Did you mean to create a material instance and change that in order to see in materials changes update in the world in real time? That’s what I did but I think you may have meant something else.
Either way, this question is solved 