Opaque Active Camo Material, masked by Vertex Color.
I've gone for the kind of active stealth camo that would work at a glance, but on closer inspection is a bit rough, a bit glitchy. Everything was substantially inspired by the camo effect of the Spider-Bot in the Cyberpunk 2077 gameplay, plus some military concepts.
Test Prop used: https://www.unrealengine.com/marketplace/military-drone
Helpful GIF tools: https://ezgif.com/