Visibility ring around cursor when small

[TokisanGames]

Description

When the brush is small (<10m) and the camera is far, it can be hard to see where the cursor is. Even though the OS mouse is right there, having feedback from Terrain3D is necessary to feel like it's working. One of my artists asked for something like a second ring around the cursor for this visual indication. Could also be a ring and a cross hair.

It could just be a larger ring, but what might be better is something that stays the same size on screen like the region labels and region grid. In the shader this can be achieved by sizing it by sqrt(camera distance) like the region grid.