I am trying to make the grid on blender round, like half a circle or similar. I'm trying to see how the magnetic fields will interact on a curve versus a flat surface. I wasn't sure how to do so, or if I was able to after already putting materials onto the existing grid. Help!
As mentioned in the comments, there is no way to change the grid pattern in Blender. A workaround to this would be to add a circle curve to guide you.
Hope this helps.