The human eye is capable of adapting to displayed information with precision over a range of 14 orders of magnitude in luminance, from bright day to starlight. The best visual displays used in simulation and training today offer a range less than 4 orders of magnitude, and their peak luminance is a tiny fraction of that of the real world scenes we are trying to simulate. Now that affordable “eye-limited resolutionâ€� visual systems are becoming a reality, the training community needs to be aware of how visual performance in the simulator may still be limited by factors other than resolution, and how luminance and precision limitations can be removed by emerging technologies. Commonly in the simulator today, visual details intended to represent part of a daytime visual scene are actually rendered at luminance levels only encountered at night in the real world. As is well known to vision scientists, the eye responds very differently at different luminance levels and training fidelity may suffer when display luminance is inappropriate for the training scenario. Fortunately, Hollywood and the consumer electronics industry are leading the way, as they did in HDTV and video game technology, with their embrace of the next big thing in visual displays, High Dynamic Range (HDR). High Dynamic Range (HDR) is a confluence of technologies that offers visual displays with higher luminance and precision, as well as a better fit to the human visual system. But what will be the value to the warfighter and what tradeoffs will be encountered in bringing HDR to training? In this paper we will discuss the scientific rationale for HDR, examine its maturity level relative to Warfighter training needs, analyze the potential it offers for higher visual fidelity in the simulator, and present the results of tactical decision making trials comparing HDR to conventional visual display systems.