While previewing a game with a bunch of checkpoints I noticed that the triggers in the distance were visible and they disappeared once I got closer to them. Not sure if this persists in published games. The game in question uses only the “plastic” voxel type and the triggers (or some part of the default checkpoints) appear to glow like the “neon” voxel type. Some screenshots provided below.
Zoomed in by changing the player’s field of view: