Segmentation Object Border Display in 2D Overlays

For some use cases in connectomics, it is useful to only show the borders/edges of a segmentation object in the 2d overlays in order to see the cell interior in the raw data clearly, but without loosing the context which cell/segmentation object it is with its color.

I was wondering if there's a way to generate such an overlay directly using shader logic for standard segmentation layers (e.g. by changing the transparency value based on the segmentation value of the neighborhood pixels on-the-fly)?