Timothy Lottes: A 1,200-Nit Gaming Monitor Has “No Perceptual Impact”

Timothy Lottes claims that the HDR Mode of the ASUS PG27AQWP-W gaming monitor “has effectively no perceptual impact” owing to a peak luminance limited to a few percent window [1]. Lottes provides no perceptual rationale to support his claim. 

FACTS:

1. Real HDR highlights are tiny. LG Display found that 90% of peak highlights in real content occupy less than 0.2% of the screen [2]. This monitor hits 1,219 nits at 1%, 915 nits at 4% and 740 nits at 9% [3]. That’s where HDR lives—not in full-screen brightness. 

1. HDR content rarely has high average brightness. A study of 41 Warner Bros. HDR movies (83 hours) found 98.6% of frames averaged under 170 nits – well within the monitor’s capability [4].

1. Viewers find high average brightness uncomfortable. NHK: comfortable = average luminance below 25% of peak. BBC: 25% of viewers called 268‑363 nits “uncomfortably bright [5].” The monitor’s 338 nits full‑field is already pushing comfort limits. 

1. HDR = contrast + peak luminance, not just peak. As Chen et al. (SIGGRAPH 2025) put it: “HDR is commonly defined by contrast and peak luminance [6].” Lottes ignores contrast entirely.

Bottom line: Lottes offers no perceptual evidence. He simply looks at TFTCentral measurements and declares HDR meaningless.

Anders Ballestad (co-author, SMPTE 2018 Warner Bros. HDR study) put it this way:

“I tend to think of BRIGHTNESS as the total amount of photons hitting you at any given time and is typically governed by the ambient room dynamics; on the other hand, I see HDR as the simultaneous experience of bright and dark features (highlights and shadows) SIMULTANEOUSLY.”

1. Timothy Lottes, “Christmas in VDR”, Neokineogfx YouTube channel (Dec. 26, 2025)
2. “Evaluation of High Dynamic Range TVs using Actual HDR Content”. Sungjin Kim, Yongmin Park, Dongwoo Kang, Jongjin Park, Jangjin Yoo, Jonguk Bae and Sooyoung Yoon. LG Display Co. © 2018, Society for Imaging Science and Technology.
3. Leo Bien Durana, “ASUS ROG Swift OLED PG27AQWP-W Monitor Review”, TechPorn. (Dec. 31, 2025).
4. “Predicting HDR Cinema Requirements from HDR Home Master Statistics”, By Ronan Boitard, Michael Smith, Michael Zink, Gerwin Damberg, and Anders Ballestad. Presented at the SMPTE 2018 Annual Technical Conference & Exhibition, Los Angeles, CA, 22–25 October 2018.
5. ITU-R BT.2408-7 (09/2023). Clauses 4.1, 4.2.
6. Kenneth Chen, Nathan Matsuda, Jon McElvain, Yang Zhao, Thomas Wan, Qi Sun, Alexandre Chapiro. 2025. “What is HDR? Perceptual Impact of Luminance and Contrast in Immersive Displays”. In SIGGRAPH ‘25: Proceedings of the Special Interest Group on Computer Graphics and Interactive Techniques Conference. ACM, New York, NY, USA. 

Timothy Lottes Anti-HDR Rant