Inverse Ghosting & Overshoot Test
Tests for pixel overdrive overshoot by rendering moving objects across precise gray-to-gray transitions. Extreme overdrive causes pixels to overshoot their target color, resulting in glowing or dark halos.
- Follow the moving object across the transition background.
- Check if a bright white halo (inverse ghosting) precedes or follows the object on dark transitions.
- Check if a dark trail follows the object on bright transitions.
- If severe halos are visible, lower your monitor OSD Overdrive / Trace Free / Response Time setting by one level.
What is Inverse Ghosting (Overshoot)? In order to speed up liquid crystal response times, monitor manufacturers apply voltage overdrive (labeled as Overdrive, Trace Free, Response Time, or AMA in your monitor OSD). If overdrive voltage is tuned too aggressively, pixels overshoot their intended color before settling. This causes bright white glowing rings (coronas) or dark trails around moving objects.
What This Test Checks
- Pixel overdrive overshoot artifacts (bright or dark inverse halos / coronas).
- Multiple critical gray-to-gray transition pairs (Dark→Light, Light→Dark, Gray→White).
- Visual artifacts caused by "Extreme" or "Fastest" monitor OSD overdrive settings.
- Balance between motion trailing and inverse overdrive artifacts.
How to Perform the Test
- Inspect each transition lane as the rectangular blocks move across the screen.
- Look for bright glowing halos preceding or trailing the moving object on dark backgrounds.
- Look for dark inverted trails trailing behind the moving object on light backgrounds.
- Open your monitor’s physical OSD menu and step down Overdrive until halos disappear.
What to Look For
- Inverse halo (Corona): A bright outline around a dark object indicates excessive overdrive voltage.
- Inverted dark trail: A dark shadow behind a light object on gray backgrounds.
- Ideal setting: Clean edges with minimal normal ghosting and zero glowing inverse halos.
Common Display Problems & Diagnostic Guidance
Manufacturer "1ms" Marketing Gimmick
Manufacturers often market "1ms GtG" by enabling an extreme overdrive mode that makes games unplayable due to horrendous overshoot halos. The optimal real-world setting is almost always the medium/normal setting.
Overdrive and Variable Refresh Rate (VRR)
Fixed overdrive levels tuned for 144Hz often cause severe overshoot when gaming framerates drop to 60 FPS under G-Sync/FreeSync. Look for monitors with variable overdrive support.
Frequently Asked Questions
What is the difference between Ghosting and Inverse Ghosting?
Ghosting is a dark, slow trail caused by sluggish pixels. Inverse ghosting is a bright glowing halo caused by pixels being forced with too much voltage, jumping past their target color.
How do I fix inverse ghosting on my monitor?
Open your monitor’s built-in OSD menu using physical buttons, locate the Overdrive setting (often called Trace Free, Response Time, or AMA), and lower it by one or two levels.