One of the major advantages of thermal optics is that they ignore visual camouflage when scanning for heat.
We take a multicam camouflaged backpack with a hand warmer inside it, and lay it down in the grass. You can see the thermal vision highlight it in a way that your eyes just can’t do. Even with the camera image brightened and centered on the pack, it can be tricky to spot, but the FLIR PS32 unit calls it out instantly.
The thermal unit I’m using in this video came from this site: