This shader accurately recreates the effect of a reflector - or 'reflex' - optical gun sight. A reflex sight works by projecting a reticle to infinity, which allows accurate aiming without needing to align the eye with the sight. The shader is perfect for modern combat themed FPS games or flight sims (for a heads-up display).
The package includes a reflex sight shader, a reflex shader for angled surfaces, and a holographic shader. A holographic sight differs from a reflex sight in that the reticle is set at a finite distance, which reduces parallax. Versions of each shader with cubemap reflections are also included.