I don't understand how to get more pixels on my UV map. What I am doing is creating new image textures having UV grids with 1024, 2048, and 4096 length and width properties, and mapping the color to base color on the shader editor.
I am then selecting all faces and remapping. I notice that this island, for example, is still staying the same width and height, so no change. Also, the UV rectangle does not show increase pixel density. What am I doing wrong?